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BAR16 - European VLBI Network imaging of 6.7 GHz methanol masers

Interferometry data

Short title: Bartkiewicz et al. (2016)
Authors: Bartkiewicz, A. Szymczak, M. van Langevelde, H. J.
Journal: Astronomy & Astrophysics, Volume 587, id.A104, 25 pp.
Bibcode:

Target type: Known_Class_II
Transitions: CH3OH_6(II)

Abstract
Context. Methanol masers at 6.7 GHz are well known tracers of high-mass star-forming regions. However, their origin is still not clearly understood. Aims: We aimed to determine the morphology and velocity structure for a large sample of the maser emission with generally lower peak flux densities than those in previous surveys. Methods: Using the European VLBI Network (EVN) we imaged the remaining sources from a sample of sources that were selected from the unbiased survey using the Torun 32 m dish. In this paper we report the results for 17 targets. Together they form a database of a total of 63 source images with high sensitivity (3sigma_rms = 15-30 mJy beam^-1), milliarcsecond angular resolution (6-10 mas) and very good spectral resolution (0.09 km s^-1 or 0.18 km s^-1) for detailed studies. Results: We studied in detail the properties of the maser clouds and calculated the mean and median values of the projected size (17.4 � 1.2 au and 5.5 au, respectively) as well as the FWHM of the line (0.373 � 0.011 km s^-1 and 0.315 km s^-1 for the mean and median values, respectively), testing whether it was consistent with Gaussian profile. We also found maser clouds with velocity gradients (71%) that ranged from 0.005 km s^-1 au^-1 to 0.210 km s^-1 au^-1. We tested the kinematic models to explain the observed structures of the 6.7 GHz emission. There were targets where the morphology supported the scenario of a rotating and expanding disk or a bipolar outflow. Comparing the interferometric and single-dish spectra we found that, typically, 50-70% of the flux was missing. This phenomena is not strongly related to the distance of the source. Conclusions: The EVN imaging reveals that in the complete sample of 63 sources the ring-like morphology appeared in 17% of sources, arcs were seen in a further 8%, and the structures were complex in 46% cases. The ultra-compact (UC) H II regions coincide in position in the sky for 13% of the sources. They are related both to extremely high and low luminosity masers from the sample. The catalogue of the complete sample is available via

Abstract

Context. Methanol masers at 6.7 GHz are well known tracers of high-mass star-forming regions. However, their origin is still not clearly understood.
Aims: We aimed to determine the morphology and velocity structure for a large sample of the maser emission with generally lower peak flux densities than those in previous surveys.
Methods: Using the European VLBI Network (EVN) we imaged the remaining sources from a sample of sources that were selected from the unbiased survey using the Torun 32 m dish. In this paper we report the results for 17 targets. Together they form a database of a total of 63 source images with high sensitivity (3sigma_rms = 15-30 mJy beam^-1), milliarcsecond angular resolution (6-10 mas) and very good spectral resolution (0.09 km s^-1 or 0.18 km s^-1) for detailed studies.
Results: We studied in detail the properties of the maser clouds and calculated the mean and median values of the projected size (17.4 � 1.2 au and 5.5 au, respectively) as well as the FWHM of the line (0.373 � 0.011 km s^-1 and 0.315 km s^-1 for the mean and median values, respectively), testing whether it was consistent with Gaussian profile. We also found maser clouds with velocity gradients (71%) that ranged from 0.005 km s^-1 au^-1 to 0.210 km s^-1 au^-1. We tested the kinematic models to explain the observed structures of the 6.7 GHz emission. There were targets where the morphology supported the scenario of a rotating and expanding disk or a bipolar outflow. Comparing the interferometric and single-dish spectra we found that, typically, 50-70% of the flux was missing. This phenomena is not strongly related to the distance of the source.
Conclusions: The EVN imaging reveals that in the complete sample of 63 sources the ring-like morphology appeared in 17% of sources, arcs were seen in a further 8%, and the structures were complex in 46% cases. The ultra-compact (UC) H II regions coincide in position in the sky for 13% of the sources. They are related both to extremely high and low luminosity masers from the sample. The catalogue of the complete sample is available via

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Detection table from Bartkiewicz et al. (2016)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Maser spot	Source name	Image	Descr.	Line	V_peak	F_peak	Telescope	Beam	PA	Detection	Class	Distance	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)							CH₃OH (class II)	(km/s)	(Jy/beam)		(arcsec)	(deg.)	Yes/No		(kpc)	(kpc)
1	+18 27 44.5643	-11 14 54.0938			20.23702	0.065443	G20.237+0.065			G20.237+00.065	Image	Descr	6.6 GHz (II);	71.8	22.98	EVN	9 x 5.4	-6	+H₂O -CH₃OH I +CH₃OH II +OH	SFR	1.000		2009 May 31
	+18 27 44.556	-11 14 54.0738	-126.734 mas	18.555 mas	20.237009	0.065475		1	1	G20.237+00.065				77.5	0.293
	+18 27 44.5604	-11 14 54.0473	-59.88 mas	45.139 mas	20.237024	0.065463		2	2	G20.237+00.065				76.3	0.487
	+18 27 44.5604	-11 14 54.0365	-60.398 mas	55.921 mas	20.237027	0.065464		3	3	G20.237+00.065				75.8	0.295
	+18 27 44.5624	-11 14 54.0831	-30.345 mas	9.301 mas	20.237019	0.065451		4	4	G20.237+00.065				75.3	0.522
	+18 27 44.5625	-11 14 54.0823	-28.809 mas	10.073 mas	20.237020	0.065451		5	5	G20.237+00.065				74.8	0.287
	+18 27 44.5599	-11 14 53.9958	-66.879 mas	96.597 mas	20.237036	0.065471		6	6	G20.237+00.065				73.6	0.242
	+18 27 44.5635	-11 14 54.1164	-13.168 mas	-23.973 mas	20.237013	0.065442		7	7	G20.237+00.065				73.3	1.292
	+18 27 44.5668	-11 14 54.032	35.952 mas	60.392 mas	20.237040	0.065442		8	8	G20.237+00.065				73.2	4.078
	+18 27 44.5651	-11 14 54.0996	10.576 mas	-7.16 mas	20.237020	0.065439		9	9	G20.237+00.065				73.2	0.755
	+18 27 44.5635	-11 14 54.1139	-12.755 mas	-21.49 mas	20.237014	0.065443		10	10	G20.237+00.065				72.5	0.685
	+18 27 44.5639	-11 14 54.1116	-7.29 mas	-19.179 mas	20.237015	0.065442		11	11	G20.237+00.065				72.1	1.024
	+18 27 44.5644	-11 14 54.0924	0 mas	0 mas	20.237021	0.065442		12	12	G20.237+00.065				71.8	22.98
	+18 27 44.5649	-11 14 54.1096	7.835 mas	-17.22 mas	20.237018	0.065438		13	13	G20.237+00.065				69	0.456
	+18 27 44.5648	-11 14 54.1138	6.614 mas	-21.423 mas	20.237016	0.065438		14	14	G20.237+00.065				68.5	0.16
2	+18 27 44.9544	-11 14 47.8165			20.239306	0.064842	G20.237+0.065			G20.239+00.065		Descr	6.6 GHz (II);	61	2.41	EVN	9 x 5.4	-6	+H₂O -CH₃OH I +CH₃OH II +OH	SFR	1.000		2009 May 31
	+18 27 44.9533	-11 14 47.8157	-16.171 mas	1.88 mas	20.239304	0.064846		1	1	G20.239+00.065				71	0.75
	+18 27 44.9529	-11 14 47.8185	-21.83 mas	-0.856 mas	20.239302	0.064847		2	2	G20.239+00.065				70.4	1.925
	+18 27 44.9632	-11 14 47.8329	132.127 mas	-15.336 mas	20.239318	0.064808		3	3	G20.239+00.065				70.3	0.381
	+18 27 44.9544	-11 14 47.8176	0 mas	0 mas	20.239305	0.064842		4	4	G20.239+00.065				61	2.414
3	+18 32 43.8186	-09 24 32.7838			22.435286	-0.169313	G22.435-0.169			G22.435-0.169	Image	Descr	6.6 GHz (II);	29.3	2.44	EVN	7.7 x 5.2	-12	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED	1.000		2009 May 31
	+18 32 43.819	-09 24 32.8629	4.274 mas	-77.749 mas	22.435267	-0.169324		1	1	G22.435-0.169				39.9	0.31
	+18 32 43.8188	-09 24 32.8549	1.846 mas	-69.665 mas	22.435268	-0.169323		2	2	G22.435-0.169				38.6	1.034
	+18 32 43.8186	-09 24 32.8484	-2.002 mas	-63.241 mas	22.435269	-0.169321		3	3	G22.435-0.169				38.1	0.858
	+18 32 43.8226	-09 24 32.7994	57.697 mas	-14.16 mas	22.435289	-0.169329		4	4	G22.435-0.169				33.6	0.402
	+18 32 43.8187	-09 24 32.7852	0 mas	0 mas	22.435285	-0.169313		5	5	G22.435-0.169				29.3	2.442
	+18 32 43.814	-09 24 32.9583	-70.486 mas	-173.053 mas	22.435234	-0.169318		6	6	G22.435-0.169				28.9	1.509
	+18 32 43.8177	-09 24 32.8159	-14.825 mas	-30.702 mas	22.435276	-0.169314		7	7	G22.435-0.169				27	0.425
	+18 32 43.8247	-09 24 32.9535	89.834 mas	-168.271 mas	22.435255	-0.169357		8	8	G22.435-0.169				25.6	0.784
	+18 32 43.8243	-09 24 32.9441	84.015 mas	-158.917 mas	22.435257	-0.169354		9	9	G22.435-0.169				24.7	1.141
	+18 32 43.8249	-09 24 32.9144	92.64 mas	-129.221 mas	22.435265	-0.169352		10	10	G22.435-0.169				23.4	0.324
4	+18 34 40.2862	-09 00 38.1037			23.009807	-0.410598	G23.010-0.410			G23.010-00.411	Image	Descr	6.6 GHz (II);	74.7	72.6	EVN	7 x 5	-5	+H₂O +CH₃OH I +CH₃OH II +OH		1.000		2009 May 31
	+18 34 40.2732	-09 00 38.3161	-194.798 mas	-213.716 mas	23.009730	-0.410577		1	1	G23.010-00.411				83.2	0.55
	+18 34 40.2901	-09 00 38.416	58.664 mas	-313.609 mas	23.009737	-0.410652		2	2	G23.010-00.411				83.1	0.336
	+18 34 40.2734	-09 00 38.3229	-191.247 mas	-220.462 mas	23.009729	-0.410579		3	3	G23.010-00.411				82.9	0.303
	+18 34 40.2729	-09 00 38.3731	-199.511 mas	-270.652 mas	23.009715	-0.410583		4	4	G23.010-00.411				82.7	1.574
	+18 34 40.2765	-09 00 38.4144	-145.399 mas	-311.958 mas	23.009712	-0.410602		5	5	G23.010-00.411				82.4	21.919
	+18 34 40.2732	-09 00 38.3098	-194.522 mas	-207.374 mas	23.009732	-0.410576		6	6	G23.010-00.411				81.6	5.371
	+18 34 40.2991	-09 00 38.5685	193.502 mas	-466.083 mas	23.009717	-0.410704		7	7	G23.010-00.411				81.4	2.845
	+18 34 40.274	-09 00 38.3521	-182.558 mas	-249.745 mas	23.009723	-0.410585		8	8	G23.010-00.411				81.3	9.972
	+18 34 40.2733	-09 00 38.3692	-193.125 mas	-266.819 mas	23.009717	-0.410584		9	9	G23.010-00.411				80.7	40.806
	+18 34 40.2974	-09 00 38.5494	168.821 mas	-446.987 mas	23.009719	-0.410696		10	10	G23.010-00.411				80.2	1.329
	+18 34 40.2864	-09 00 38.5183	4.018 mas	-415.9 mas	23.009705	-0.410651		11	11	G23.010-00.411				79.9	0.378
	+18 34 40.2742	-09 00 38.3658	-180.122 mas	-263.407 mas	23.009720	-0.410587		12	12	G23.010-00.411				79.5	12.367
	+18 34 40.2929	-09 00 38.4694	100.85 mas	-366.987 mas	23.009730	-0.410669		13	13	G23.010-00.411				79.3	3.695
	+18 34 40.2817	-09 00 38.4677	-67.63 mas	-365.271 mas	23.009709	-0.410627		14	14	G23.010-00.411				79	0.728
	+18 34 40.2667	-09 00 38.1189	-291.282 mas	-16.504 mas	23.009767	-0.410528		15	15	G23.010-00.411				78.8	0.642
	+18 34 40.2778	-09 00 38.1147	-125.788 mas	-12.313 mas	23.009788	-0.410568		16	16	G23.010-00.411				78.7	0.372
	+18 34 40.3008	-09 00 38.4741	219.223 mas	-371.722 mas	23.009743	-0.410698		17	17	G23.010-00.411				78.6	0.301
	+18 34 40.3009	-09 00 38.4658	221.708 mas	-363.425 mas	23.009746	-0.410698		18	18	G23.010-00.411				78.4	0.246
	+18 34 40.2876	-09 00 38.4397	22.345 mas	-337.273 mas	23.009727	-0.410646		19	19	G23.010-00.411				78.2	0.122
	+18 34 40.2895	-09 00 38.1839	50.43 mas	-81.453 mas	23.009794	-0.410620		20	20	G23.010-00.411				76.8	4.669
	+18 34 40.2892	-09 00 38.1838	46.076 mas	-81.377 mas	23.009793	-0.410619		21	21	G23.010-00.411				76.7	6.375
	+18 34 40.2883	-09 00 38.1842	31.486 mas	-81.789 mas	23.009791	-0.410615		22	22	G23.010-00.411				75.5	36.047
	+18 34 40.2884	-09 00 38.18	34.037 mas	-77.577 mas	23.009793	-0.410615		23	23	G23.010-00.411				75.5	29.831
	+18 34 40.2862	-09 00 38.1024	0 mas	0 mas	23.009807	-0.410597		24	24	G23.010-00.411				74.7	72.617
	+18 34 40.2877	-09 00 38.1723	23.3 mas	-69.86 mas	23.009793	-0.410612		25	25	G23.010-00.411				74.7	40.359
	+18 34 40.289	-09 00 38.1507	42.041 mas	-48.323 mas	23.009801	-0.410614		26	26	G23.010-00.411				74.6	64.844
	+18 34 40.2907	-09 00 38.136	68.423 mas	-33.641 mas	23.009808	-0.410618		27	27	G23.010-00.411				74.5	9.851
	+18 34 40.2997	-09 00 37.9883	202.398 mas	114.089 mas	23.009861	-0.410632		28	28	G23.010-00.411				74.3	38.381
	+18 34 40.2913	-09 00 38.1392	76.724 mas	-36.759 mas	23.009808	-0.410621		29	29	G23.010-00.411				74.3	10.449
	+18 34 40.2928	-09 00 38.1384	100.084 mas	-35.954 mas	23.009811	-0.410626		30	30	G23.010-00.411				73.8	6.59
	+18 34 40.2895	-09 00 38.1431	49.372 mas	-40.654 mas	23.009804	-0.410614		31	30	G23.010-00.411				74.1	4.296
	+18 34 40.287	-09 00 38.1091	12.488 mas	-6.688 mas	23.009807	-0.410601		32	31	G23.010-00.411				74	14.21
	+18 34 40.2923	-09 00 38.1248	92.294 mas	-22.367 mas	23.009814	-0.410623		33	32	G23.010-00.411				74	3.299
	+18 34 40.2886	-09 00 38.1413	37.229 mas	-38.862 mas	23.009803	-0.410611		34	33	G23.010-00.411				73.8	8.999
	+18 34 40.2876	-09 00 38.1347	21.959 mas	-32.309 mas	23.009802	-0.410607		35	34	G23.010-00.411				73.4	3.573
	+18 34 40.2912	-09 00 38.1898	76.315 mas	-87.397 mas	23.009795	-0.410627		36	35	G23.010-00.411				73.3	3.357
	+18 34 40.2976	-09 00 38.0887	171.269 mas	13.669 mas	23.009832	-0.410637		37	36	G23.010-00.411				73.3	2.676
	+18 34 40.2814	-09 00 38.0721	-71.484 mas	30.307 mas	23.009806	-0.410576		38	37	G23.010-00.411				73.2	6.161
	+18 34 40.2947	-09 00 38.1357	127.879 mas	-33.335 mas	23.009815	-0.410633		39	38	G23.010-00.411				72.7	24.507
	+18 34 40.2891	-09 00 38.1988	44.291 mas	-96.383 mas	23.009789	-0.410620		40	39	G23.010-00.411				72.2	0.578
5	+18 35 8.119	-07 35 4.13			24.328577	0.144207	G24.329+0.144			G24.33+00.12	Image	Descr	6.6 GHz (II);	110.3	1.62	EVN	5.7 x 4.7	2	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	1.000		2009 June 1
	+18 35 8.10333	-07 35 4.02682	-234.435 mas	104.783 mas	24.328573	0.144278		1	1	G24.33+00.12				112.9	0.365
	+18 35 8.10355	-07 35 4.01715	-231.19 mas	114.45 mas	24.328576	0.144279		2	2	G24.33+00.12				112.9	0.442
	+18 35 8.1176	-07 35 4.18066	-20.363 mas	-49.06 mas	24.328562	0.144206		3	3	G24.33+00.12				112	0.465
	+18 35 8.11737	-07 35 4.19109	-23.818 mas	-59.485 mas	24.328559	0.144206		4	4	G24.33+00.12				111.9	0.42
	+18 35 8.11896	-07 35 4.1316	0 mas	0 mas	24.328577	0.144207		5	5	G24.33+00.12				110.3	1.616
6	+18 36 5.72977	-07 31 19.2012			24.493538	-0.038324	G24.494-0.039			G24.494-00.038	Image	Descr	6.6 GHz (II);	115.1	2.85	EVN	7.8 x 5.3	-12	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	1.000		2009 June 1
	+18 36 5.72976	-07 31 19.2	0 mas	0 mas	24.493538	-0.038324		1	1	G24.494-00.038				115.1	2.85
	+18 36 5.72982	-07 31 19.19	0.842 mas	9.978 mas	24.493540	-0.038323		2	2	G24.494-00.038				114.8	1.991
	+18 36 5.72924	-07 31 19.1796	-7.78 mas	20.377 mas	24.493542	-0.038320		3	3	G24.494-00.038				113.7	0.382
	+18 36 5.74489	-07 31 19.0153	226.976 mas	184.659 mas	24.493612	-0.038356		4	4	G24.494-00.038				113.1	0.384
	+18 36 5.72057	-07 31 19.2364	-137.792 mas	-36.379 mas	24.493511	-0.038295		5	5	G24.494-00.038				113.2	0.374
	+18 36 5.74614	-07 31 19.019	245.766 mas	180.996 mas	24.493614	-0.038361		6	6	G24.494-00.038				111.5	1.682
	+18 36 5.74097	-07 31 19.2475	168.173 mas	-47.488 mas	24.493547	-0.038371		7	7	G24.494-00.038				109.4	1.567
	+18 36 5.74253	-07 31 19.3379	191.525 mas	-137.901 mas	24.493528	-0.038389		8	8	G24.494-00.038				109.6	0.837
7	+18 36 12.5622	-07 12 10.8211			24.78979	0.083286	G24.790+0.083			G24.790+00.083	Image	Descr	6.6 GHz (II);	113.4	55.83	EVN	7.4 x 5.2	-14	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	1.000		2009 June 1
	+18 36 12.5451	-07 12 10.9394	-254.737 mas	-117.751 mas	24.789729	0.083333		1	1	G24.790+00.083				116.6	0.142
	+18 36 12.5526	-07 12 10.7436	-141.611 mas	77.971 mas	24.789791	0.083330		2	2	G24.790+00.083				114.7	3.191
	+18 36 12.5595	-07 12 10.8505	-38.114 mas	-28.927 mas	24.789778	0.083291		3	3	G24.790+00.083				114.5	0.331
	+18 36 12.557	-07 12 10.7225	-76.344 mas	99.104 mas	24.789805	0.083317		4	4	G24.790+00.083				114.2	12.151
	+18 36 12.5596	-07 12 10.8494	-36.854 mas	-27.814 mas	24.789778	0.083291		5	5	G24.790+00.083				113.8	0.276
	+18 36 12.5621	-07 12 10.8216	0 mas	0 mas	24.789790	0.083286		6	6	G24.790+00.083				113.4	55.832
	+18 36 12.4685	-07 12 9.73917	-1403.01 mas	1082.43 mas	24.789879	0.083767		7	7	G24.790+00.083				113	0.585
	+18 36 12.4694	-07 12 9.76245	-1389.84 mas	1059.15 mas	24.789875	0.083761		8	8	G24.790+00.083				112.5	0.403
	+18 36 12.4697	-07 12 9.78613	-1385.53 mas	1035.47 mas	24.789870	0.083757		9	9	G24.790+00.083				112.4	5.931
	+18 36 12.4702	-07 12 9.76505	-1378.79 mas	1056.55 mas	24.789876	0.083758		10	10	G24.790+00.083				112.3	0.482
	+18 36 12.4851	-07 12 9.82288	-1154.24 mas	998.717 mas	24.789890	0.083696		11	11	G24.790+00.083				112.1	2.253
	+18 36 12.4694	-07 12 9.78532	-1390.56 mas	1036.28 mas	24.789869	0.083758		12	12	G24.790+00.083				111.9	6.627
	+18 36 12.4696	-07 12 9.8056	-1386.73 mas	1016 mas	24.789865	0.083755		13	13	G24.790+00.083				111.5	0.376
	+18 36 12.4716	-07 12 9.8381	-1357.89 mas	983.497 mas	24.789861	0.083744		14	14	G24.790+00.083				111.5	0.254
	+18 36 12.4739	-07 12 10.1259	-1323.01 mas	695.68 mas	24.789794	0.083698		15	15	G24.790+00.083				110.4	10.985
	+18 36 12.4745	-07 12 10.1195	-1314.43 mas	702.126 mas	24.789797	0.083697		16	16	G24.790+00.083				109.5	1.767
	+18 36 12.5328	-07 12 11.2251	-438.847 mas	-403.487 mas	24.789635	0.083342		17	17	G24.790+00.083				108.4	0.23
	+18 36 12.5337	-07 12 11.226	-426.166 mas	-404.449 mas	24.789636	0.083338		18	18	G24.790+00.083				108.3	2.431
	+18 36 12.537	-07 12 11.2223	-376.519 mas	-400.742 mas	24.789643	0.083327		19	19	G24.790+00.083				108	4.453
	+18 36 12.5355	-07 12 11.2258	-399.395 mas	-404.246 mas	24.789640	0.083332		20	20	G24.790+00.083				108.1	2.173
	+18 36 12.5348	-07 12 11.2292	-408.564 mas	-407.577 mas	24.789638	0.083334		21	21	G24.790+00.083				107.9	5.13
	+18 36 12.5332	-07 12 11.2275	-432.878 mas	-405.869 mas	24.789635	0.083340		22	22	G24.790+00.083				107.8	8.003
	+18 36 12.5326	-07 12 11.2267	-442.739 mas	-405.074 mas	24.789634	0.083342		23	23	G24.790+00.083				107.7	12.215
	+18 36 12.4656	-07 12 10.2672	-1447.73 mas	554.386 mas	24.789743	0.083711		24	24	G24.790+00.083				106.5	0.394
8	+18 36 18.3875	-07 08 50.8051			24.850202	0.087444	G24.850+0.087			G24.850+00.087	Image	Descr	6.6 GHz (II);	110.2	5.9	EVN	6.9 x 5.2	5	+H₂O -CH₃OH I +CH₃OH II -OH	SFR	1.000		2009 June 1
	+18 36 18.3803	-07 08 50.8406	-109.496 mas	-35.007 mas	24.850180	0.087466		1	1	G24.850+00.087				114.9	2.413
	+18 36 18.3803	-07 08 50.8534	-109.305 mas	-47.761 mas	24.850176	0.087465		2	2	G24.850+00.087				114.9	0.547
	+18 36 18.3805	-07 08 50.8337	-106.147 mas	-28.145 mas	24.850182	0.087467		3	3	G24.850+00.087				114.6	3.144
	+18 36 18.3848	-07 08 50.8338	-42.638 mas	-28.227 mas	24.850190	0.087451		4	4	G24.850+00.087				113.7	0.422
	+18 36 18.3843	-07 08 50.821	-49.674 mas	-15.365 mas	24.850192	0.087454		5	5	G24.850+00.087				112.3	0.531
	+18 36 18.3842	-07 08 50.8196	-50.345 mas	-14.013 mas	24.850192	0.087455		6	6	G24.850+00.087				110.9	0.273
	+18 36 18.3876	-07 08 50.8056	0 mas	0 mas	24.850202	0.087444		7	7	G24.850+00.087				110.2	5.955
	+18 36 18.3843	-07 08 50.7691	-49.529 mas	36.453 mas	24.850205	0.087461		8	8	G24.850+00.087				108	1.207
	+18 36 18.386	-07 08 50.7717	-24.542 mas	33.906 mas	24.850207	0.087454		9	9	G24.850+00.087				107.8	0.249
	+18 36 18.3851	-07 08 50.7761	-36.86 mas	29.541 mas	24.850205	0.087457		10	10	G24.850+00.087				107.9	0.48
9	+18 43 57.9687	-04 34 24.0938			28.010929	-0.426306	G28.011-0.426			G28.011-00.426	Image	Descr	6.6 GHz (II);	16.1	1.26	EVN	7.8 x 5.3	-18	+H₂O +CH₃OH II +OH	SFR	1.000		2010 March 12
	+18 43 57.9748	-04 34 24.0894	92.574 mas	3.003 mas	28.010942	-0.426328		1	1	G28.011-00.426				28	0.413
	+18 43 57.9744	-04 34 24.0924	86.825 mas	0.042 mas	28.010941	-0.426327		2	2	G28.011-00.426				25.4	0.281
	+18 43 57.9755	-04 34 24.1008	102.492 mas	-8.423 mas	28.010941	-0.426332		3	3	G28.011-00.426				24.7	0.479
	+18 43 57.9881	-04 34 24.1054	291.51 mas	-13 mas	28.010963	-0.426379		4	4	G28.011-00.426				23.5	0.652
	+18 43 57.9728	-04 34 24.0332	61.879 mas	59.222 mas	28.010952	-0.426313		5	5	G28.011-00.426				17.8	0.193
	+18 43 57.9678	-04 34 24.1101	-13.026 mas	-17.706 mas	28.010924	-0.426305		6	6	G28.011-00.426				17	1.192
	+18 43 57.9686	-04 34 24.0924	0 mas	0 mas	28.010930	-0.426306		7	7	G28.011-00.426				16.1	1.262
10	+18 46 12.9612	-02 39 1.3798			29.978053	-0.047586	G29.976-0.047			G29.978-00.048	Image	Descr	6.6 GHz (II);	103.5	31.2	EVN	8.7 x 5.4	-9	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	1.000		2010 March 14
	+18 46 12.9609	-02 39 1.37973	-4.834 mas	-0.926 mas	29.978052	-0.047585		1	1	G29.978-00.048				104.2	6.845
	+18 46 12.9612	-02 39 1.3788	0 mas	0 mas	29.978053	-0.047586		2	2	G29.978-00.048				103.5	31.162
	+18 46 12.9672	-02 39 1.42082	90.625 mas	-42.016 mas	29.978054	-0.047614		3	3	G29.978-00.048				102.5	6.235
	+18 46 12.9635	-02 39 1.30467	34.319 mas	74.13 mas	29.978076	-0.047585		4	4	G29.978-00.048				100.9	0.858
	+18 46 12.9606	-02 39 1.32355	-8.366 mas	55.249 mas	29.978066	-0.047577		5	5	G29.978-00.048				100.9	0.285
	+18 46 12.9623	-02 39 1.3244	16.719 mas	54.398 mas	29.978069	-0.047583		6	6	G29.978-00.048				99.9	0.296
	+18 46 12.9642	-02 39 1.30368	45.163 mas	75.117 mas	29.978077	-0.047588		7	7	G29.978-00.048				99.8	1.253
	+18 46 12.9638	-02 39 1.30582	38.405 mas	72.979 mas	29.978076	-0.047586		8	8	G29.978-00.048				99.4	0.188
	+18 46 12.9626	-02 39 1.32129	20.622 mas	57.507 mas	29.978070	-0.047584		9	9	G29.978-00.048				99.3	0.46
	+18 46 12.9586	-02 39 1.28497	-39.646 mas	93.832 mas	29.978071	-0.047564		10	10	G29.978-00.048				98.4	10.922
	+18 46 12.96	-02 39 1.27969	-18.45 mas	99.11 mas	29.978075	-0.047569		11	11	G29.978-00.048				98.3	1.242
	+18 46 12.9624	-02 39 1.32459	18.05 mas	54.211 mas	29.978069	-0.047584		12	12	G29.978-00.048				98	1.11
	+18 46 12.9637	-02 39 1.3033	36.858 mas	75.497 mas	29.978076	-0.047585		13	13	G29.978-00.048				98	2.256
	+18 46 12.9646	-02 39 1.29409	50.31 mas	84.71 mas	29.978080	-0.047588		14	14	G29.978-00.048				97.6	2.957
	+18 46 12.9651	-02 39 1.30646	58.784 mas	72.34 mas	29.978078	-0.047591		15	15	G29.978-00.048				97.3	6.905
	+18 46 12.9639	-02 39 1.30273	40.918 mas	76.075 mas	29.978077	-0.047586		16	16	G29.978-00.048				97	13.643
11	+18 47 3.07004	-02 30 36.2597			30.198087	-0.169142	G30.199-0.169			G30.198-00.169	Image	Descr	6.6 GHz (II);	108.2	14.7	EVN	8.3 x 5.4	-8	+H₂O -CH₃OH I +CH₃OH II +OH	SFR	1.000		2010 March 14
	+18 47 3.07027	-02 30 36.2491	2.829 mas	10.127 mas	30.198090	-0.169142		1	1	G30.198-00.169				110.4	5.812
	+18 47 3.07039	-02 30 36.2658	4.614 mas	-6.567 mas	30.198086	-0.169144		2	2	G30.198-00.169				110.3	2.189
	+18 47 3.07017	-02 30 36.2538	1.343 mas	5.443 mas	30.198089	-0.169142		3	3	G30.198-00.169				109.7	1.287
	+18 47 3.07015	-02 30 36.2606	1.063 mas	-1.381 mas	30.198087	-0.169143		4	4	G30.198-00.169				109.1	5.271
	+18 47 3.07008	-02 30 36.2592	0 mas	0 mas	30.198087	-0.169142		5	5	G30.198-00.169				108.2	14.69
	+18 47 3.06407	-02 30 36.3002	-90.183 mas	-41.008 mas	30.198066	-0.169125		6	6	G30.198-00.169				105.4	0.71
	+18 47 3.05895	-02 30 36.3216	-166.889 mas	-62.443 mas	30.198051	-0.169109		7	7	G30.198-00.169				105.2	1.015
	+18 47 3.06423	-02 30 36.3144	-87.819 mas	-55.249 mas	30.198062	-0.169128		8	8	G30.198-00.169				104.9	1.028
	+18 47 3.07046	-02 30 36.4059	5.698 mas	-146.731 mas	30.198052	-0.169162		9	9	G30.198-00.169				104.8	0.83
	+18 47 3.06369	-02 30 36.3157	-95.825 mas	-56.526 mas	30.198061	-0.169126		10	10	G30.198-00.169				104.5	0.442
	+18 47 3.05839	-02 30 36.2832	-175.386 mas	-23.978 mas	30.198059	-0.169102		11	11	G30.198-00.169				104.4	0.264
	+18 47 3.06246	-02 30 36.331	-114.333 mas	-71.815 mas	30.198055	-0.169123		12	12	G30.198-00.169				103.4	1.387
	+18 47 3.06293	-02 30 36.3465	-107.274 mas	-87.316 mas	30.198052	-0.169127		13	13	G30.198-00.169				100.8	0.689
12	+18 47 8.29781	-02 29 29.3199			30.224563	-0.180022	G30.199-0.169			G30.224-00.180	Image	Descr	6.6 GHz (II);	113.4	2.58	EVN	8.5 x 5.3	-8	+H₂O -CH₃OH I +CH₃OH II +OH	SFR	1.000		2010 March 14
	+18 47 8.29776	-02 29 29.3208	0 mas	0 mas	30.224562	-0.180022		1	1	G30.224-00.180				113.4	2.557
	+18 47 8.29647	-02 29 29.3068	-19.347 mas	14.031 mas	30.224563	-0.180015		2	2	G30.224-00.180				112.5	0.493
	+18 47 8.29829	-02 29 29.3073	7.905 mas	13.522 mas	30.224567	-0.180022		3	3	G30.224-00.180				112.2	0.411
	+18 47 8.29842	-02 29 29.3116	9.897 mas	9.227 mas	30.224566	-0.180023		4	4	G30.224-00.180				111.4	0.316
	+18 47 8.29813	-02 29 29.3179	5.545 mas	2.937 mas	30.224564	-0.180023		5	5	G30.224-00.180				111.3	1.101
	+18 47 8.29899	-02 29 29.3208	18.44 mas	0.031 mas	30.224565	-0.180026		6	6	G30.224-00.180				111.1	0.223
13	+18 51 21.8671	-00 12 5.3			32.744235	-0.075521	G32.744-0.076			G32.744-00.076	Image	Descr	6.6 GHz (II);	33.4	10.5	EVN	6.4 x 4.7	-31	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	1.000		2010 March 12
	+18 51 21.8481	-00 12 4.22395	-285.122 mas	1075.25 mas	32.744465	-0.075314		1	1	G32.744-00.076				39.1	4.192
	+18 51 21.8534	-00 12 4.23485	-205.913 mas	1064.35 mas	32.744472	-0.075335		2	2	G32.744-00.076				38.3	8.882
	+18 51 21.8521	-00 12 4.2306	-225.144 mas	1068.6 mas	32.744471	-0.075330		3	3	G32.744-00.076				38.4	5.298
	+18 51 21.8584	-00 12 4.24539	-131.195 mas	1053.81 mas	32.744479	-0.075355		4	4	G32.744-00.076				37.8	0.512
	+18 51 21.8578	-00 12 4.24144	-140.279 mas	1057.76 mas	32.744479	-0.075352		5	5	G32.744-00.076				37.6	1.092
	+18 51 21.8583	-00 12 4.24138	-133.037 mas	1057.82 mas	32.744480	-0.075354		6	6	G32.744-00.076				36.3	0.422
	+18 51 21.8671	-00 12 5.29978	-0.639 mas	-0.582 mas	32.744235	-0.075521		7	7	G32.744-00.076				34.4	0.183
	+18 51 21.858	-00 12 5.22655	-137.005 mas	72.654 mas	32.744235	-0.075478		8	8	G32.744-00.076				34.1	0.668
	+18 51 21.8671	-00 12 5.2992	0 mas	0 mas	32.744235	-0.075521		9	9	G32.744-00.076				33.4	10.535
	+18 51 21.8654	-00 12 5.31938	-26.065 mas	-20.175 mas	32.744227	-0.075517		10	10	G32.744-00.076				32.1	6.395
	+18 51 21.8661	-00 12 5.31532	-15.255 mas	-16.117 mas	32.744229	-0.075519		11	11	G32.744-00.076				31.7	1.082
	+18 51 21.8643	-00 12 5.0534	-41.825 mas	245.805 mas	32.744290	-0.075479		12	12	G32.744-00.076				30.7	0.878
	+18 51 21.8591	-00 12 5.20523	-120.351 mas	93.973 mas	32.744243	-0.075479		13	13	G32.744-00.076				30.2	3.556
	+18 51 21.8594	-00 12 5.20737	-115.868 mas	91.832 mas	32.744243	-0.075480		14	14	G32.744-00.076				29.3	0.468
14	+18 53 21.4518	+01 13 46.0317			34.244926	0.133565	G34.257+0.153			G34.245+00.134	Image	Descr	6.6 GHz (II);	55	1.4	EVN	9.4 x 4.3	26	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED	1.000		2010 March 14
	+18 53 21.4548	+01 13 46.0299	46.804 mas	-0.858 mas	34.244931	0.133553		1	1	G34.245+00.134				62.6	0.193
	+18 53 21.4545	+01 13 46.0302	42.323 mas	-0.566 mas	34.244931	0.133554		2	2	G34.245+00.134				62	0.084
	+18 53 21.4555	+01 13 46.021	58.04 mas	-9.77 mas	34.244930	0.133549		3	3	G34.245+00.134				61.9	0.101
	+18 53 21.4534	+01 13 46.0622	25.169 mas	31.365 mas	34.244936	0.133563		4	4	G34.245+00.134				61.5	0.102
	+18 53 21.4541	+01 13 46.0353	36.771 mas	4.503 mas	34.244931	0.133556		5	5	G34.245+00.134				61.2	1.393
	+18 53 21.4523	+01 13 46.0721	9.798 mas	41.269 mas	34.244937	0.133568		6	6	G34.245+00.134				60.3	0.504
	+18 53 21.453	+01 13 46.0432	19.577 mas	12.389 mas	34.244931	0.133562		7	7	G34.245+00.134				59.5	0.128
	+18 53 21.4518	+01 13 46.0343	2.494 mas	3.544 mas	34.244927	0.133565		8	8	G34.245+00.134				58.6	0.34
	+18 53 21.4474	+01 13 46.1018	-63.596 mas	70.975 mas	34.244935	0.133590		9	9	G34.245+00.134				57	0.628
	+18 53 21.4492	+01 13 46.0371	-36.674 mas	6.257 mas	34.244922	0.133575		10	10	G34.245+00.134				56.9	0.712
	+18 53 21.4517	+01 13 46.0308	0 mas	0 mas	34.244925	0.133565		11	11	G34.245+00.134				55	1.44
15	+18 53 18.6448	+01 15 0.4115			34.257981	0.153393	G34.257+0.153			G34.258+00.153	Image	Descr	6.6 GHz (II);	57.6	5.9	EVN	9.3 x 6.4	11	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED	1.000		2010 March 14
	+18 53 18.6441	+01 15 0.386097	-11.38 mas	-24.303 mas	34.257973	0.153392		1	1	G34.258+00.153				58.1	0.365
	+18 53 18.6454	+01 15 0.430521	8.011 mas	20.121 mas	34.257987	0.153393		2	2	G34.258+00.153				58	3.797
	+18 53 18.6449	+01 15 0.4104	0 mas	0 mas	34.257981	0.153393		3	3	G34.258+00.153				57.6	5.862
	+18 53 18.6547	+01 15 0.386308	147.389 mas	-24.092 mas	34.257993	0.153353		4	4	G34.258+00.153				56.7	0.232
16	+18 53 19.0935	+01 24 13.862			34.395653	0.221839	G34.403+0.232			G34.396+00.222	Image	Descr	6.6 GHz (II);	55.6	5.2	EVN	17.6 x 7.1	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED	1.000		2010 March 14
	+18 53 19.09	+01 24 13.8854	-52.259 mas	21.82 mas	34.395653	0.221855		1	1	G34.396+00.222				62.1	0.486
	+18 53 19.091	+01 24 13.7465	-35.981 mas	-117.128 mas	34.395620	0.221833		2	2	G34.396+00.222				60.6	0.199
	+18 53 19.0918	+01 24 13.736	-23.973 mas	-127.623 mas	34.395619	0.221829		3	3	G34.396+00.222				60.4	0.147
	+18 53 19.0915	+01 24 13.7587	-29.204 mas	-104.93 mas	34.395624	0.221833		4	4	G34.396+00.222				60.4	0.234
	+18 53 19.092	+01 24 13.8963	-20.989 mas	32.721 mas	34.395659	0.221848		5	5	G34.396+00.222				60.1	0.358
	+18 53 19.0923	+01 24 13.9065	-16.871 mas	42.875 mas	34.395662	0.221849		6	6	G34.396+00.222				59.8	0.375
	+18 53 19.0934	+01 24 13.8636	0 mas	0 mas	34.395654	0.221839		7	7	G34.396+00.222				55.6	5.227
17	+18 54 0.65696	+02 01 19.326			35.024762	0.349704	G35.025+0.350			G35.025+00.350	Image		6.6 GHz (II);	43.9	5.3	EVN	5.7 x 4.7	-19	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	1.000		2010 March 12
	+18 54 0.651784	+02 01 19.395	-76.439 mas	69.014 mas	35.024769	0.349732		1	1	G35.025+00.350				46.3	0.291
	+18 54 0.652085	+02 01 19.4026	-71.93 mas	76.612 mas	35.024771	0.349732		2	2	G35.025+00.350				46.2	0.272
	+18 54 0.659137	+02 01 19.1876	33.848 mas	-138.399 mas	35.024732	0.349678		3	3	G35.025+00.350				45.9	1.058
	+18 54 0.652284	+02 01 19.3988	-68.945 mas	72.754 mas	35.024771	0.349731		4	4	G35.025+00.350				45	0.189
	+18 54 0.658176	+02 01 19.2051	19.442 mas	-120.938 mas	35.024734	0.349684		5	5	G35.025+00.350				44.5	3.143
	+18 54 0.65688	+02 01 19.326	0 mas	0 mas	35.024762	0.349704		6	6	G35.025+00.350				43.9	5.296
	+18 54 0.655706	+02 01 19.2492	-17.61 mas	-76.766 mas	35.024740	0.349699		7	7	G35.025+00.350				43.4	0.522
	+18 54 0.655662	+02 01 19.2789	-18.277 mas	-47.123 mas	35.024748	0.349703		8	8	G35.025+00.350				42.2	0.937
	+18 54 0.655759	+02 01 19.3294	-16.817 mas	3.389 mas	35.024760	0.349709		9	9	G35.025+00.350				41.5	0.413
18	+18 30 36.067	-10 07 10.88			21.562665	-0.032743	G21.563-0.031			G21.56-00.03			6.6 GHz (II);			EVN	7.8 x 5.3	-10	+H₂O -CH₃OH I +CH₃OH II +OH	SFR			2009 June 1
19	+19 01 26.251	+04 42 19.96			38.258475	-0.073436	G38.258-0.074			G38.26-00.07			6.6 GHz (II);			EVN	5.3 x 4	-50	+H₂O -CH₃OH I +CH₃OH II -OH	SFR			2010 March 12

DSS colored	2MASS colored	WISE colored
PACS color (70-160 um)	SPIRE color (250-500 um)	GLIMPSE 360
SDSS color	IRAC color I1,I2,I4	NVSS (1.4GHz)
ATLASGAL 870 um	ATLASGAL 870 um + Planck	Bolocam 1.1 mm
UKIDSS K Download UKIDSS K FITS	2MASS K Download 2MASS K FITS

select MAX(met2_data_all.ra_hms) as ra_hms,MAX(met2_data_all.dec_dms) as dec_dms,MAX(met2_data_all.source_name) as source_name,MAX(met2_data_all.ra) as ra,MAX(met2_data_all.dec) as dec,MAX(met2_data_all.l) as l,MAX(met2_data_all.b) as b,MAX(met2_data_all.grp) as grp,MAX(met2_data_all.other_name) as other_name,MAX(met2_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met2_data_all.line) as line,MAX(met2_data_all.vrange) as vrange,MAX(met2_data_all.vpeak) as vpeak,MAX(met2_data_all.peak) as peak,MAX(met2_data_all.fwhm) as fwhm,MAX(met2_data_all.int) as int,MAX(met2_data_all.rms) as rms,MAX(met2_data_all.units) as units,MAX(met2_data_all.units_rms) as units_rms,MAX(met2_data_all.date_txt) as date_txt,MAX(met2_data_all.telescope_ref) as telescope_ref,MAX(met2_data_all.telescope_conf) as telescope_conf,MAX(met2_data_all.v_step) as v_step,MAX(met2_data_all.beam) as beam,MAX(met2_data_all.beam_maj) as beam_maj,MAX(met2_data_all.beam_min) as beam_min,MAX(met2_data_all.beam_pa) as beam_pa,MAX(met2_data_all.ref) as ref,MAX(met2_data_all.list_ref) as list_ref,MAX(met2_data_all.ascii) as ascii,MAX(met2_data_all.url) as url,MAX(met2_data_all.image) as image,MAX(met2_data_all.image2) as image2,MAX(met2_data_all.image3) as image3,MAX(met2_data_all.descr) as descr,MAX(met2_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met2_data_all.dist) as dist,1 as dist_parallax,MAX(met2_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM met2_data_all  LEFT JOIN all_objects_withmet ON met2_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met2_data_all.line=transitions."Line"  WHERE ref ilike 'BAR16' AND detected=true AND hide=false GROUP BY ref

select met2_data_all.ra_hms,met2_data_all.dec_dms,met2_data_all.source_name,met2_data_all.ra,met2_data_all.dec,met2_data_all.l,met2_data_all.b,met2_data_all.grp,met2_data_all.other_name,met2_data_all.other_desc,met2_data_all.thermal,met2_data_all.line,met2_data_all.vrange,met2_data_all.vpeak,met2_data_all.peak,met2_data_all.fwhm,met2_data_all.int,met2_data_all.rms,met2_data_all.units,met2_data_all.units_rms,met2_data_all.date_txt,met2_data_all.telescope_ref,met2_data_all.telescope_conf,met2_data_all.v_step,met2_data_all.beam,met2_data_all.beam_maj,met2_data_all.beam_min,met2_data_all.beam_pa,met2_data_all.ref,met2_data_all.list_ref,met2_data_all.ascii,met2_data_all.url,met2_data_all.image,met2_data_all.image2,met2_data_all.image3,met2_data_all.descr,met2_data_all.id,met2_data_all.mjy_flag,met2_data_all.rms_mjy_flag,met2_data_all.dist,met2_data_all.dist_parallax,met2_data_all.date_txt,line_det,type,simbad_types_cat FROM met2_data_all   LEFT JOIN all_objects_withmet ON met2_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met2_data_all.line=transitions."Line"  WHERE ref ilike 'BAR16' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

BAR16 - European VLBI Network imaging of 6.7 GHz methanol masers

Interferometry data

View as list of objects

Detection table from Bartkiewicz et al. (2016)