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URQ11 - The Red MSX Source survey: ammonia and water maser analysis of massive star-forming regions

Short title: Urquhart et al. (2011)
Authors: Urquhart, J. S.Morgan, L. K.Figura, C. C.Moore, T. J. T.Lumsden, S. L.Hoare, M. G.Oudmaijer, R. D.Mottram, J. C.Davies, B.Dunham, M. K.
Journal: Monthly Notices of the Royal Astronomical Society, Volume 418, Issue 3, pp. 1689-1706.
Bibcode:
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Target type: MSX
Observations category: SF.general
Facility type: single-dish

Abstract
The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra-compact H II regions from a sample of ~2000 MSX and Two Micron All Sky Survey (2MASS) colour-selected sources. We have used the 100-m Green Bank Telescope to search for 22-24 GHz water maser and ammonia (1,1), (2,2) and (3,3) emission towards ~600 RMS sources located within the northern Galactic plane. We have identified 308 H₂O masers which corresponds to an overall detection rate of ~50 per cent. We find no significant difference in the detection rate for H II regions and MYSOs which would suggest that the conditions required to produce maser emission are equally likely in both phases. Comparing the detection rates as a function of luminosity, we find the H₂O detection rate has a positive dependence on the source luminosity, with the detection rate increasing with increasing luminosity. We detect ammonia emission towards 479 of these massive young stars, which corresponds to ~80 per cent. Ammonia is an excellent probe of high-density gas allowing us to measure key parameters such as gas temperatures, opacities and column densities, as well as providing an insight into the gas kinematics. The average kinetic temperature, full width at half-maximum linewidth and total NH₃ column density for the sample are approximately 22 K, 2 km s^-1 and 2x 10¹⁵ cm^-2, respectively. We find that the NH₃ (1,1) linewidth and kinetic temperature are correlated with luminosity, and finding no underlying dependence of these parameters on the evolutionary phase of the embedded sources, we conclude that the observed trends in the derived parameters are more likely to be due to the energy output of the central source and/or the linewidth-clump mass relationship. The velocities of the peak H₂O masers and the NH₃ emission are in excellent agreement with each other, which would strongly suggest an association between the dense gas and the maser emission. Moreover, we find the bolometric luminosity of the embedded source and the isotropic luminosity of the H₂O maser are also correlated. We conclude from the correlations of the cloud and water maser velocities and the bolometric and maser luminosity that there is a strong dynamical relationship between the embedded young massive star and the H₂O maser.

Abstract

The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra-compact H II regions from a sample of ~2000 MSX and Two Micron All Sky Survey (2MASS) colour-selected sources. We have used the 100-m Green Bank Telescope to search for 22-24 GHz water maser and ammonia (1,1), (2,2) and (3,3) emission towards ~600 RMS sources located within the northern Galactic plane. We have identified 308 H₂O masers which corresponds to an overall detection rate of ~50 per cent. We find no significant difference in the detection rate for H II regions and MYSOs which would suggest that the conditions required to produce maser emission are equally likely in both phases. Comparing the detection rates as a function of luminosity, we find the H₂O detection rate has a positive dependence on the source luminosity, with the detection rate increasing with increasing luminosity.

We detect ammonia emission towards 479 of these massive young stars, which corresponds to ~80 per cent. Ammonia is an excellent probe of high-density gas allowing us to measure key parameters such as gas temperatures, opacities and column densities, as well as providing an insight into the gas kinematics. The average kinetic temperature, full width at half-maximum linewidth and total NH₃ column density for the sample are approximately 22 K, 2 km s^-1 and 2x 10¹⁵ cm^-2, respectively. We find that the NH₃ (1,1) linewidth and kinetic temperature are correlated with luminosity, and finding no underlying dependence of these parameters on the evolutionary phase of the embedded sources, we conclude that the observed trends in the derived parameters are more likely to be due to the energy output of the central source and/or the linewidth-clump mass relationship.

The velocities of the peak H₂O masers and the NH₃ emission are in excellent agreement with each other, which would strongly suggest an association between the dense gas and the maser emission. Moreover, we find the bolometric luminosity of the embedded source and the isotropic luminosity of the H₂O maser are also correlated. We conclude from the correlations of the cloud and water maser velocities and the bolometric and maser luminosity that there is a strong dynamical relationship between the embedded young massive star and the H₂O maser.

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Detection table from Urquhart et al. (2011)

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ID	Obs. RA	Obs. Dec	l	b	Group id	grpv	Source name	Image	Line	V_range	V_peak	F_peak	∫F dv	Telescope	V_step	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)					H₂O	(km/s)	(km/s)	(Jy)	(Jy*km/s)		(km/s)	(Jy)	(arcsec)	Yes/No		(kpc)
1	18 00 22.7	-18 52 08	10.3845	2.2128	G10.384+2.213	G10.3845+2.2128	G010.3844+02.2128	Image	22 GHz;	3.5;14.3	5.2	1.02	1.07	GBT	0.32	0.170	30	+H₂O -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
2	18 08 39.7	-19 52 03	10.4719	0.0205	G10.472+0.027	G10.4719+0.0205	G010.4718+00.0206	Image	22 GHz;	49;128.6	89.7	58.88	436.52	GBT	0.32	2.050	30	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2009 Nov 25 - 2010 Dec 10
3	18 00 34.6	-18 45 17.6	10.5069	2.2285	G10.507+2.229	G10.5067+2.2286	G010.5067+02.2285	Image	22 GHz;	-5.4;37	6.8	11.22	29.51	GBT	0.32	0.190	30	+H₂O -CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
4	18 10 30.3	-19 55 30	10.6312	-0.3865	G10.623-0.384	G10.6312-0.3865	G010.6311-00.3864	Image	22 GHz;	-29.4;49	0.1	275.42	758.58	GBT	0.32	0.430	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
5	18 19 12.2	-20 47 32.3	10.8412	-2.5921	G10.841-2.592	G10.8414-2.5916	G010.8411-02.5919	Image	22 GHz;	-89.3;52.8	-81.5	165.96	537.03	GBT	0.32	0.200	30	+H₂O +CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
6	18 09 8.1	-19 27 23	10.8856	0.1221	G10.885+0.123	G10.8855+0.1227	G010.8856+00.1221	Image	22 GHz;	0.2;26.8	19.6	67.61	208.93	GBT	0.32	0.170	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
7	18 09 39.6	-19 26 25.8	10.9593	0.0217	G10.959+0.022	G10.9583+0.0222	G010.9592+00.0217	Image	22 GHz;	-0.4;41.5	24.2	32.36	36.31	GBT	0.32	0.270	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
8	18 09 43.4	-19 26 28.7	10.9658	0.0083	G10.959+0.022	G10.9658+0.0089	G010.9657+00.0083	Image	22 GHz;	18.6;22.2	20.2	14.79	28.84	GBT	0.32	0.260	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
9	18 17 12.9	-19 59 37	11.3253	-1.8041	G11.325-1.804	G11.3253-1.8041	G011.3252-01.8040	Image	22 GHz;	-14.7;-7.1	-8.4	30.20	38.90	GBT	0.32	0.260	30	+H₂O	EVOLVED		2009 Nov 25 - 2010 Dec 10
10	18 16 22.6	-19 41 19.3	11.5002	-1.4859	G11.499-1.485	G11.4993-1.4850	G011.5001-01.4857	Image	22 GHz;	-2.6;22.5	0.5	66.07	104.71	GBT	0.32	0.170	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
11	18 12 23.7	-18 22 51.6	12.1994	-0.0344	G12.199-0.033	G12.1992-0.0335	G012.1993-00.0342	Image	22 GHz;	103;105.3	103.6	3.02	3.24	GBT	0.32	0.110	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
12	18 16 51.3	-18 41 30.1	12.4315	-1.1118	G12.432-1.118	G12.4315-1.1118	G012.4314-01.1117	Image	22 GHz;	-37;-24.7	-35.3	18.20	42.66	GBT	0.32	0.160	30	+H₂O -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
13	18 14 13.6	-17 55 37.6	12.8063	-0.1987	G12.797-0.193	G12.8091-0.2001	G012.8062-00.1987	Image	22 GHz;	-4.2;34.8	-2.9	16.98	46.77	GBT	0.32	0.240	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
14	18 11 50.7	-17 31 14.5	12.8910	0.4937	G12.889+0.490	G12.8887+0.4897	G012.8909+00.4938	Image	22 GHz;	11.9;32.3	21.3	11.75	33.11	GBT	0.32	0.130	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
15	18 14 39.7	-17 51 59	12.9092	-0.2609	G12.908-0.260	G12.9084-0.2602	G012.9090-00.2607	Image	22 GHz;	22.8;49.1	37.1	14.45	21.38	GBT	0.32	0.120	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
16	18 14 22.2	-17 42 47.9	13.0106	-0.1268	G13.011-0.127	G13.0106-0.1268	G013.0105-00.1267	Image	22 GHz;	-7.7;34.4	8.5	12.02	67.61	GBT	0.32	0.190	30	+H₂O	SFR		2009 Nov 25 - 2010 Dec 10
17	18 17 24.4	-17 22 14.5	13.6564	-0.5998	G13.657-0.600	G13.6567-0.5995	G013.6562-00.5997	Image	22 GHz;	30.5;52.7	39.2	104.71	218.78	GBT	0.32	0.110	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
18	18 18 38.7	-16 53 37.3	14.2168	-0.6345	G14.217-0.635	G14.2168-0.6345	G014.2166-00.6344	Image	22 GHz;	27.1;28.7	27.7	10.00	6.61	GBT	0.32	0.110	30	+H₂O	SFR		2009 Nov 25 - 2010 Dec 10
19	18 18 53.5	-16 47 42.7	14.3314	-0.6399	G14.332-0.642	G14.3317-0.6419	G014.3313-00.6397	Image	22 GHz;	15.7;35.6	23.8	46.77	87.10	GBT	0.32	0.160	30	+H₂O +CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
20	18 16 59.7	-16 14 50.6	14.5983	0.0201	G14.604+0.016	G14.5990+0.0194	G014.5982+00.0202	Image	22 GHz;	18.8;30.5	19.3	4.90	10.72	GBT	0.32	0.160	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
21	18 17 2.6	-16 14 30.1	14.6088	0.0127	G14.604+0.016	G14.6043+0.0164	G014.6087+00.0127	Image	22 GHz;	4.4;39.7	26.2	16.98	24.55	GBT	0.32	0.130	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
22	18 20 19.4	-16 13 31.1	14.9960	-0.6734	G15.034-0.677	G14.9963-0.6733	G014.9958-00.6732	Image	22 GHz;	18.7;22.4	21.8	1.55	1.74	GBT	0.32	0.110	30	+H₂O +CH₃OH I +CH₃OH II +OH			2009 Nov 25 - 2010 Dec 10
23	18 20 25.5	-16 11 35.5	15.0357	-0.6797	G15.034-0.677	G15.0346-0.6770	G015.0357-00.6795	Image	22 GHz;	5.8;25.8	20.8	20.42	56.23	GBT	0.32	0.180	30	+H₂O +CH₃OH I +CH₃OH II +OH			2009 Nov 25 - 2010 Dec 10
24	18 17 20.9	-15 43 47.3	15.0941	0.1913	G15.094+0.192	G15.0942+0.1915	G015.0939+00.1913	Image	22 GHz;	21.7;39.4	28.1	54.95	81.28	GBT	0.32	0.110	30	+H₂O +CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
25	18 20 34.8	-16 06 26.3	15.1289	-0.6718	G15.128-0.672	G15.1282-0.6715	G015.1288-00.6717	Image	22 GHz;	-49;-41.6	-47	0.62	0.81	GBT	0.32	0.110	30	+H₂O -CH₃OH I -SiO	SFR		2009 Nov 25 - 2010 Dec 10
26	18 20 4.8	-14 53 31.2	16.1439	0.0075	G16.144+0.007	G16.1439+0.0075	G016.1438+00.0074	Image	22 GHz;	33.6;34.7	34	0.69	0.89	GBT	0.32	0.100	30	+H₂O -CH₃OH I	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
27	18 18 26	-13 55 37.9	16.8057	0.8148	G16.806+0.815	G16.8057+0.8148	G016.8055+00.8149	Image	22 GHz;	-54;-25.2	-27.3	24.55	40.74	GBT	0.32	0.130	30	+H₂O -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
28	18 29 24.3	-15 15 42.1	16.8690	-2.1554	G16.868-2.158	G16.8681-2.1582	G016.8689-02.1552	Image	22 GHz;	-35.1;26.4	25	1905.46	1778.28	GBT	0.32	0.160	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
29	18 20 35.5	-14 04 16	16.9262	0.2853	G16.927+0.286	G16.9266+0.2854	G016.9261+00.2854	Image	22 GHz;	27.6;29.8	28.3	1.91	3.16	GBT	0.32	0.100	30	+H₂O -CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
30	18 18 8.6	-13 45 5.8	16.9271	0.9599	G16.927+0.960	G16.9268+0.9597	G016.9270+00.9599	Image	22 GHz;	-73.5;-59.8	-64.2	13.49	83.18	GBT	0.32	0.100	30	+H₂O +CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
31	18 19 7.2	-13 45 30.2	17.0334	0.7476	G17.035+0.748	G17.0351+0.7481	G017.0332+00.7476	Image	22 GHz;	8.6;10	9.5	1.55	1.35	GBT	0.32	0.100	30	+H₂O -CH₃OH I +CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
32	18 19 25.3	-13 45 35.3	17.0666	0.6826	G17.067+0.683	G17.0666+0.6826	G017.0666+00.6826	Image	22 GHz;	24.8;26	25.7	1.62	1.38	GBT	0.32	0.100	30	+H₂O -CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
33	18 14 21.1	-12 44 33.4	17.3766	2.2511	G17.372+2.246	G17.3766+2.2511	G017.3765+02.2512	Image	22 GHz;	-1.3;13.6	12.5	7.24	10.96	GBT	0.32	0.100	30	+H₂O -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
34	18 22 26.3	-13 30 12.2	17.6381	0.1566	G17.638+0.157	G17.6383+0.1566	G017.6380+00.1566	Image	22 GHz;	16.1;35.9	19.4	616.60	691.83	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2009 Nov 25 - 2010 Dec 10
35	18 23 20.8	-13 15 5.4	17.9643	0.0797	G17.964+0.079	G17.9643+0.0793	G017.9642+00.0798	Image	22 GHz;	14.8;30.8	21.6	28.18	95.50	GBT	0.32	0.100	30	+H₂O -CH₃OH I +CH₃OH II	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
36	18 22 49.1	-13 09 59	17.9790	0.2334	G17.979+0.232	G17.9788+0.2317	G017.9789+00.2335	Image	22 GHz;	12.7;18.8	15.9	9.12	16.22	GBT	0.32	0.100	30	+H₂O -CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
37	18 17 58.2	-12 07 25	18.3414	1.7680	G18.340+1.772	G18.3414+1.7681	G018.3412+01.7681	Image	22 GHz;	6.3;8.4	7.2	0.40	0.44	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
38	18 25 48.3	-13 06 29.5	18.3707	-0.3819	G18.371-0.382	G18.3709-0.3822	G018.3706-00.3818	Image	22 GHz;	27.8;76.7	70	0.98	1.38	GBT	0.32	0.100	30	+H₂O -CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
39	18 24 50.4	-12 39 20.9	18.6610	0.0371	G18.666+0.033	G18.6619+0.0345	G018.6608+00.0372	Image	22 GHz;	57.4;97.4	96.8	1.38	5.13	GBT	0.32	0.120	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
40	18 26 48.1	-12 26 28.3	19.0742	-0.2862	G19.071-0.282	G19.0742-0.2862	G019.0741-00.2861	Image	22 GHz;	64.4;69	68.3	2.19	2.75	GBT	0.32	0.150	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
41	18 27 38.3	-11 56 41.3	19.6086	-0.2359	G19.609-0.234	G19.6092-0.2346	G019.6085-00.2357	Image	22 GHz;	21.9;68.5	42.3	389.05	1949.84	GBT	0.32	0.260	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
42	18 27 42.3	-11 57 04	19.6106	-0.2532	G19.612-0.255	G19.6106-0.2532	G019.6106-00.2531	Image	22 GHz;	41.9;42.6	42.4	0.89	0.71	GBT	0.32	0.140	30	+H₂O -CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
43	18 29 14.4	-11 50 30.1	19.8819	-0.5348	G19.884-0.535	G19.8838-0.5348	G019.8817-00.5347	Image	22 GHz;	0.2;48.5	42.5	95.50	204.17	GBT	0.32	0.160	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
44	18 26 57.3	-11 32 10.7	19.8923	0.1023	G19.892+0.102	G19.8923+0.1023	G019.8922+00.1023	Image	22 GHz;	41.9;43.2	42.6	1.41	1.00	GBT	0.32	0.090	30	+H₂O -CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
45	18 28 18.8	-11 40 37.6	19.9225	-0.2578	G19.926-0.257	G19.9260-0.2572	G019.9224-00.2577	Image	22 GHz;	54.3;69.6	65.2	2.24	2.40	GBT	0.32	0.100	30	+H₂O +CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
46	18 28 10.4	-11 28 51.6	20.0802	-0.1362	G20.081-0.136	G20.0810-0.1358	G020.0801-00.1360	Image	22 GHz;	33;56.3	46.3	39.81	70.79	GBT	0.32	0.160	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
47	18 29 17	-10 52 27.1	20.7439	-0.0953	G20.750-0.091	G20.7439-0.0953	G020.7438-00.0952	Image	22 GHz;	10.9;58	18	4.27	10.47	GBT	0.32	0.160	30	+H₂O +CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
48	18 29 16.4	-10 52 1.2	20.7492	-0.0899	G20.750-0.091	G20.7498-0.0910	G020.7491-00.0898	Image	22 GHz;	15.9;39.2	21.3	8.91	33.11	GBT	0.32	0.120	30	+H₂O +CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
49	18 29 12.2	-10 50 37.7	20.7618	-0.0639	G20.764-0.059	G20.7620-0.0634	G020.7617-00.0638	Image	22 GHz;	50.9;61.5	59.9	26.30	75.86	GBT	0.32	0.090	30	+H₂O +CH₃OH I +CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
50	18 30 36.1	-10 07 11.6	21.5626	-0.0330	G21.563-0.031	G21.5622-0.0327	G021.5624-00.0329	Image	22 GHz;	108;119.1	109.3	9.33	19.50	GBT	0.32	0.100	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
51	18 31 44.2	-09 22 17	22.3555	0.0654	G22.356+0.066	G22.3565+0.0663	G022.3554+00.0655	Image	22 GHz;	15.2;89	75.2	15.49	38.90	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
52	18 34 29.5	-08 43 30.7	23.2427	-0.2399	G23.257-0.240	G23.2453-0.2400	G023.2426-00.2398	Image	22 GHz;	60;64.2	60.3	0.68	0.60	GBT	0.32	0.100	30	+H₂O +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
53	18 33 24.8	-08 33 50	23.2629	0.0713	G23.265+0.077	G23.2654+0.0769	G023.2628+00.0713	Image	22 GHz;	-50.3;-49.6	-49.8	0.69	0.58	GBT	0.32	0.100	30	+H₂O +CH₃OH I -CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
54	18 33 24.2	-08 33 42.1	23.2637	0.0744	G23.265+0.077	G23.2654+0.0769	G023.2637+00.0744	Image	22 GHz;	106.3;111.3	108.8	0.68	0.74	GBT	0.32	0.140	30	+H₂O +CH₃OH I -CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
55	18 33 14.4	-08 23 57.5	23.3892	0.1851	G23.389+0.185	G23.3891+0.1853	G023.3891+00.1851	Image	22 GHz;	93.3;95.5	94.7	2.00	3.31	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
56	18 33 53.5	-08 07 18.5	23.7098	0.1701	G23.708+0.170	G23.7082+0.1700	G023.7097+00.1701	Image	22 GHz;	112.5;113.4	113	1.26	1.02	GBT	0.32	0.140	30	+H₂O +CH₃OH I -CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
57	18 33 19.5	-07 55 38.3	23.8177	0.3841	G23.818+0.384	G23.8179+0.3841	G023.8176+00.3841	Image	22 GHz;	71.9;77.8	74.7	7.41	9.33	GBT	0.32	0.090	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
58	18 34 37.2	-08 00 10.4	23.8984	0.0647	G23.901+0.066	G23.8984+0.0645	G023.8983+00.0648	Image	22 GHz;	38.9;49.7	39.2	1.55	4.37	GBT	0.32	0.100	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
59	18 34 25.3	-07 54 49.7	23.9549	0.1493	G23.955+0.151	G23.9547+0.1508	G023.9548+00.1494	Image	22 GHz;	72.8;82.5	73.2	1.17	1.41	GBT	0.32	0.140	30	+H₂O +CH₃OH I -CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
60	18 34 4.1	-07 40 31.4	24.1261	0.3369	G24.126+0.337	G24.1259+0.3370	G024.1260+00.3369	Image	22 GHz;	-20.4;-16.5	-19.2	2.69	5.37	GBT	0.32	0.130	30	+H₂O -CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
61	18 34 44.8	-07 43 49.1	24.1547	0.1627	G24.157+0.163	G24.1560+0.1635	G024.1546+00.1627	Image	22 GHz;	99.1;112.3	110.4	1.29	2.04	GBT	0.32	0.130	30	+H₂O -CH₃OH I	SFR		2009 Nov 25 - 2010 Dec 10
62	18 34 57.2	-07 43 26.8	24.1840	0.1198	G24.184+0.120	G24.1840+0.1201	G024.1838+00.1198	Image	22 GHz;	39.1;40.1	39.7	1.05	1.07	GBT	0.32	0.130	30	+H₂O -CH₃OH I -CH₃OH II	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
63	18 36 46.9	-07 35 38.4	24.5077	-0.2223	G24.506-0.219	G24.5052-0.2187	G024.5076-00.2222	Image	22 GHz;	33.9;36.4	34.6	2.82	3.09	GBT	0.32	0.140	30	+H₂O -CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
64	18 36 10.7	-07 11 18.6	24.7991	0.0969	G24.790+0.084	G24.7991+0.0969	G024.7989+00.0969	Image	22 GHz;	110.2;113.6	112.9	1.48	2.88	GBT	0.32	0.130	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
65	18 37 30.5	-06 41 16.8	25.3954	0.0335	G25.395+0.034	G25.3947+0.0341	G025.3953+00.0336	Image	22 GHz;	-29.5;-5.9	-15.8	63.10	89.13	GBT	0.32	0.110	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
66	18 35 37.5	-06 26 34.1	25.3982	0.5616	G25.398+0.562	G25.3976+0.5618	G025.3981+00.5617	Image	22 GHz;	-3.4;36.3	1.6	2.19	7.76	GBT	0.32	0.140	30	+H₂O -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
67	18 38 30.1	-06 44 29.4	25.4609	-0.2100	G25.463-0.214	G25.4605-0.2095	G025.4608-00.2098	Image	22 GHz;	114.8;120.8	115.4	2.09	6.03	GBT	0.32	0.130	30	+H₂O -CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
68	18 34 21	-05 59 42	25.6499	1.0490	G25.650+1.050	G25.6495+1.0498	G025.6498+01.0491	Image	22 GHz;	-9.5;81.3	41.7	32359.37	23988.33	GBT	0.32	0.190	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
69	18 38 2.9	-06 23 46	25.7162	0.0485	G25.710+0.044	G25.7160+0.0486	G025.7161+00.0486	Image	22 GHz;	75.5;112	91.8	0.76	1.70	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
70	18 39 17.1	-06 06 43.9	26.1095	-0.0946	G26.109-0.094	G26.1093-0.0935	G026.1094-00.0944	Image	22 GHz;	8;28.8	23.3	120.23	251.19	GBT	0.32	0.140	30	+H₂O +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
71	18 34 25.9	-05 10 52	26.3819	1.4057	G26.380+1.405	G26.3802+1.4049	G026.3819+01.4057	Image	22 GHz;	8.9;58.4	41.7	12.30	17.78	GBT	0.32	0.110	30	+H₂O -CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
72	18 33 30.3	-05 01 3.7	26.4208	1.6857	G26.422+1.685	G26.4213+1.6852	G026.4207+01.6858	Image	22 GHz;	37.8;55.9	55.2	15.85	23.99	GBT	0.32	0.100	30	+H₂O -CH₃OH I +CH₃OH II -OH			2009 Nov 25 - 2010 Dec 10
73	18 39 56	-05 38 47.4	26.5973	-0.0243	G26.597-0.024	G26.5976-0.0237	G026.5972-00.0241	Image	22 GHz;	19.1;25	23.8	12.02	17.38	GBT	0.32	0.120	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
74	18 41 13.2	-05 08 59.6	27.1853	-0.0814	G27.185-0.082	G27.1852-0.0821	G027.1852-00.0812	Image	22 GHz;	-21.4;57.8	17.7	3801.89	9332.54	GBT	0.32	0.360	30	+H₂O -CH₃OH I -CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
75	18 40 30.6	-05 01 3.4	27.2221	0.1361	G27.221+0.137	G27.2215+0.1361	G027.2220+00.1361	Image	22 GHz;	93.4;94.1	93.8	0.78	0.46	GBT	0.32	0.090	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
76	18 41 19.5	-04 44 23.6	27.5619	0.0828	G27.563+0.083	G27.5625+0.0813	G027.5618+00.0828	Image	22 GHz;	78;89.1	88.7	0.85	1.23	GBT	0.32	0.120	30	+H₂O -CH₃OH I +CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
77	18 22 22.3	-01 56 58.2	27.8642	5.5659	G27.864+5.566	G27.8642+5.5659	G027.8640+05.5660	Image	22 GHz;	13.8;15.6	15.1	0.44	0.12	GBT	0.32	0.090	30	+H₂O	SFR		2009 Nov 25 - 2010 Dec 10
78	18 42 58.2	-04 13 56.3	28.2008	-0.0495	G28.200-0.050	G28.2001-0.0493	G028.2007-00.0494	Image	22 GHz;	82.8;99	95.6	52.48	93.33	GBT	0.32	0.130	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
79	18 42 42.6	-04 09 47.9	28.2326	0.0394	G28.233+0.040	G28.2327+0.0398	G028.2325+00.0394	Image	22 GHz;	97.6;102.4	100.9	6.46	11.48	GBT	0.32	0.100	30	+H₂O -CH₃OH I -CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
80	18 44 21.9	-04 17 39.1	28.3047	-0.3873	G28.295-0.377	G28.3049-0.3875	G028.3046-00.3871	Image	22 GHz;	83.7;84.2	83.9	0.95	0.44	GBT	0.32	0.090	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
81	18 42 26.9	-04 01 23.9	28.3272	0.1616	G28.327+0.161	G28.3272+0.1615	G028.3271+00.1617	Image	22 GHz;	27.7;90.1	28.4	12.88	14.13	GBT	0.32	0.120	30	+H₂O	SFR		2009 Nov 25 - 2010 Dec 10
82	18 43 28.9	-03 50 17.5	28.6097	0.0169	G28.608+0.017	G28.6078+0.0173	G028.6096+00.0170	Image	22 GHz;	101.4;107.4	105.5	4.79	4.68	GBT	0.32	0.120	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
83	18 42 37	-03 29 38.8	28.8171	0.3663	G28.817+0.365	G28.8172+0.3647	G028.8170+00.3663	Image	22 GHz;	57.7;91.2	85.5	41.69	125.89	GBT	0.32	0.140	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
84	18 43 46.3	-03 35 28.7	28.8623	0.0657	G28.862+0.066	G28.8619+0.0657	G028.8621+00.0657	Image	22 GHz;	42.4;113.4	105.3	416.87	1047.13	GBT	0.32	0.110	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
85	18 47 31.7	-03 15 14	29.5905	-0.6145	G29.598-0.619	G29.5905-0.6143	G029.5904-00.6144	Image	22 GHz;	78.7;80.8	80.1	1.74	1.74	GBT	0.32	0.090	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
86	18 37 50.6	-01 45 38.9	29.8130	2.2195	G29.811+2.220	G29.8130+2.2195	G029.8129+02.2195	Image	22 GHz;	48;60.6	49.2	0.26	0.02	GBT	0.32	0.090	30	+H₂O -CH₃OH I -CH₃OH II -SiO	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
87	18 46 4.2	-02 39 20.9	29.9565	-0.0175	G29.956-0.016	G29.9556-0.0161	G029.9564-00.0174	Image	22 GHz;	74.9;117.7	99.7	60.26	398.11	GBT	0.32	0.150	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
88	18 47 0.6	-02 27 51.8	30.2341	-0.1393	G30.230-0.144	G30.2336-0.1382	G030.2340-00.1392	Image	22 GHz;	-28.9;40	-10	23.99	74.13	GBT	0.32	0.120	30	+H₂O -CH₃OH I +CH₃OH II -OH -SiO	SFR		2009 Nov 25 - 2010 Dec 10
89	18 46 26	-02 19 10.9	30.2971	0.0549	G30.296+0.055	G30.2960+0.0555	G030.2971+00.0549	Image	22 GHz;	93.1;96.8	93.8	2.09	2.95	GBT	0.32	0.090	30	+H₂O -CH₃OH I +CH₃OH II	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
90	18 47 39	-02 20 47.8	30.4119	-0.2278	G30.419-0.232	G30.4107-0.2280	G030.4117-00.2277	Image	22 GHz;	124.6;126.8	125.2	1.05	1.55	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
91	18 46 59.3	-02 07 26	30.5346	0.0209	G30.536+0.018	G30.5360+0.0190	G030.5345+00.0209	Image	22 GHz;	-38.8;66.9	45.6	5.89	18.62	GBT	0.32	0.140	30	+H₂O +CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
92	18 47 18.9	-02 06 16.2	30.5890	-0.0427	G30.589-0.043	G30.5887-0.0426	G030.5889-00.0426	Image	22 GHz;	-21.5;45.3	42.2	1.91	5.50	GBT	0.32	0.140	30	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
93	18 47 41.9	-02 00 20.2	30.7207	-0.0827	G30.719-0.081	G30.7194-0.0809	G030.7206-00.0826	Image	22 GHz;	91.9;98.9	93	39.81	44.67	GBT	0.32	0.120	30	+H₂O +CH₃OH I +CH₃OH II	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
94	18 47 15.8	-01 47 8.9	30.8668	0.1141	G30.862+0.120	G30.8661+0.1145	G030.8667+00.1141	Image	22 GHz;	-2.9;40.7	40.1	4.27	5.25	GBT	0.32	0.130	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
95	18 47 31.8	-01 43 0.5	30.9586	0.0862	G30.959+0.086	G30.9588+0.0860	G030.9585+00.0862	Image	22 GHz;	-59.6;40.2	37.4	23.99	102.33	GBT	0.32	0.120	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
96	18 48 22	-01 48 28.8	30.9727	-0.1411	G30.972-0.141	G30.9725-0.1416	G030.9726-00.1410	Image	22 GHz;	68.9;88.1	82	4.07	8.32	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
97	18 45 51.8	-01 29 13.6	30.9728	0.5619	G30.973+0.562	G30.9728+0.5622	G030.9727+00.5620	Image	22 GHz;	13.9;40.3	14.5	1.00	1.45	GBT	0.32	0.090	30	+H₂O -CH₃OH I +CH₃OH II -OH	SFR		2009 Nov 25 - 2010 Dec 10
98	18 48 10.8	-01 45 29.2	30.9960	-0.0772	G31.000-0.075	G30.9996-0.0751	G030.9959-00.0771	Image	22 GHz;	56.5;66	65.6	1.82	2.51	GBT	0.32	0.100	30	+H₂O +CH₃OH I +CH₃OH II	SFR		2009 Nov 25 - 2010 Dec 10
99	18 46 19.8	-01 27 39.6	31.0494	0.4697	G31.050+0.470	G31.0494+0.4697	G031.0494+00.4698	Image	22 GHz;	18.7;42.2	31	6.46	25.12	GBT	0.32	0.150	30	+H₂O -CH₃OH I +CH₃OH II	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
100	18 47 41.6	-01 37 22.4	31.0608	0.0928	G31.060+0.093	G31.0599+0.0932	G031.0606+00.0928	Image	22 GHz;	13.3;22	15	15.85	24.55	GBT	0.32	0.130	30	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED		2009 Nov 25 - 2010 Dec 10
101	18 48 45.1	-01 33 13	31.2431	-0.1110	G31.243-0.111	G31.2430-0.1109	G031.2430-00.1108	Image	22 GHz;	-16.4;35.4	14.2	165.96	288.40	GBT	0.32	0.680	30	+H₂O +CH₃OH I -CH₃OH II +OH	SFR		2009 Nov 25 - 2010 Dec 10
102	18 48 12.4	-01 26 30.5	31.2804	0.0614	G31.280+0.061	G31.2801+0.0617	G031.2803+00.0615

Display data from paper

URQ11 - The Red MSX Source survey: ammonia and water maser analysis of massive star-forming regions

View as list of objects

Detection table from Urquhart et al. (2011)