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BLA04 - 12.2 GHz survey towards 6.7 GHz methanol masers. A comparison of 12.2 GHz and 6.7 GHz spectra

Short title: Blaszkiewicz & Kus (2004)
Authors: Blaszkiewicz, L. Kus, A. J.
Journal: Astronomy and Astrophysics, v.413, p.233-240 (2004)
Bibcode:

Non-detection table: Show non-detection table
Detection table: Show detection table (22 detection)
Target type: Known_Class_II
Transitions: CH3OH_12(II)

Abstract
We present results of a 12.2 GHz methanol maser survey done with the Torun 32 m radio telescope. We examined 261 star forming-sites, known as containing 6.7 GHz maser emission sources. The survey resulted in 49 sources with maser line detection, with 21 previously unknown emissions. All detected 12.2 GHz masers have been observed at the 6.7 GHz transition. Only one 12.2 GHz source had no 6.7 GHz counterpart. We compared basic spectral line properties at both transitions. In a few cases we observed absorption features and emitting counterparts in the other monitored frequency, at the same velocity. Figure \ref{fig5} is only available in electronic form at http://www.edpsciences.org Tables 2 and 3 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/413/233

Abstract

We present results of a 12.2 GHz methanol maser survey done with the Torun 32 m radio telescope. We examined 261 star forming-sites, known as containing 6.7 GHz maser emission sources. The survey resulted in 49 sources with maser line detection, with 21 previously unknown emissions. All detected 12.2 GHz masers have been observed at the 6.7 GHz transition. Only one 12.2 GHz source had no 6.7 GHz counterpart. We compared basic spectral line properties at both transitions. In a few cases we observed absorption features and emitting counterparts in the other monitored frequency, at the same velocity. Figure \ref{fig5} is only available in electronic form at Tables 2 and 3 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via

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Detection table from Blaszkiewicz & Kus (2004)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Image	Descr.	Line	V_range	V_peak	F_peak	∫F dv	Telescope	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)					CH₃OH (class II)	(km/s)	(km/s)	(Jy)	(Jy*km/s)		(arcsec)	Yes/No		(kpc)
1	05 39 27.8	-35 40 58	240.5810	-29.2937	G240.581-29.294	G173.59+02.44	Image	Descr	12 GHz (II);	-33;-31	-31.6	12.5	6.8	Torun_32m	180	+CH₃OH II			2002 June 24 - August 15
2	18 15 45.5	-16 38 58	14.1036	0.0896	G14.101+0.087	18128-1640	Image	Descr	12 GHz (II);	9.8;15.5	11.2	7.3	3.5	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II	SFR		2002 June 24 - August 15
3	18 26 03	-11 52 34	19.4884	0.1399	G19.485+0.151	18232-1154	Image	Descr	12 GHz (II);	3.0;5.7	3.9	81.6	39.4	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
4	18 34 54.5	-08 50 04	23.1931	-0.3814	G23.207-0.378	G23.19-0.38	Image	Descr	12 GHz (II);	81.2;82.8	81.8	6.9	3	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
5	18 35 10.7	-08 17 56	23.6993	-0.1941	G23.706-0.198	18324-0820	Image	Descr	12 GHz (II);	76.0;80.0	79	10.5	10.5	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
6	18 35 20.8	-07 48 48	24.1495	-0.0076	G24.148-0.009	G24.15-0.01	Image		12 GHz (II);	17.0;18.2	17.7	8.7	3.4	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
7	18 38 3.1	-06 24 32	25.7052	0.0418	G25.709+0.044	G25.71+0.04	Image	Descr	12 GHz (II);	88.9;97.2	95.6	213.7	192.2	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
8	18 39 4.7	-06 24 17	25.8259	-0.1829	G25.826-0.178	G25.83-0.18	Image	Descr	12 GHz (II);	90.0;92.0	90.7	31.2	17.1	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
9	18 40 3.8	-04 58 09	27.2142	0.2572	G27.220+0.260	G27.21+0.26	Image	Descr	12 GHz (II);	13.5;14.8	14.1	17.5	6.9	Torun_32m	180	+H₂O +CH₃OH II	EVOLVED		2002 June 24 - August 15
10	18 42 12.8	-03 24 26	28.8483	0.4955	G28.842+0.494	G28.85+0.50	Image		12 GHz (II);	86.9;87.8	87.3	4.7	1.8	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II	SFR		2002 June 24 - August 15
11	18 47 25.5	-01 43 21	30.9415	0.1071	G30.942+0.107	18448-0146	Image		12 GHz (II);	99.0;103.0	100.2	6.2	5.9	Torun_32m	180	+CH₃OH II	EVOLVED		2002 June 24 - August 15
12	18 53 28.7	+00 31 58	33.6387	-0.2110	G33.641-0.228	G33.64-0.21	Image	Descr	12 GHz (II);	58.2;60.4	58.6	89.4	21.7	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
13	19 00 14.4	+04 02 35	37.5328	-0.1110	G37.546-0.112	18577+0358	Image		12 GHz (II);	61.4;63.0	61.8	9.8	5.6	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II	SFR		2002 June 24 - August 15
14	19 10 10.6	+09 05 27	43.1498	0.0155	G43.167+0.011	G43.15+0.02	Image	Descr	12 GHz (II);	-3.6;-4.6	-4.1	14.3	4.5	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2002 June 24 - August 15
15	19 10 13.5	+09 06 14	43.1669	0.0110	G43.167+0.011	G43.17+0.01	Image	Descr	12 GHz (II);	-20.5;-19.2	-19.4	9.3	2.5	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2002 June 24 - August 15
16	19 10 16.2	+09 06 02	43.1690	-0.0004	G43.167+0.011	G43.17-0.00	Image	Descr	12 GHz (II);	-43.8;-45	-44.4	13.6	4.5	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2002 June 24 - August 15
17	19 14 26.1	+09 22 34	43.8892	-0.7837	G43.890-0.784	19120+0917	Image	Descr	12 GHz (II);	45.8;52.5	51.8	5.2	4.6	Torun_32m	180	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2002 June 24 - August 15
18	19 20 57	+14 46 40	49.4091	0.3323	G49.416+0.326	19186+1440	Image	Descr	12 GHz (II);	-9.3;-10.2	-10.1	13.5	4.4	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED		2002 June 24 - August 15
	19 20 57	+14 46 40	49.4091	0.3323	G49.416+0.326	19186+1440			12 GHz (II);	-3.5;-0.3	-1.9	27.8	19	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED		2002 June 24 - August 15
20	19 32 35.3	+16 57 34	52.6601	-1.0900	G52.660-1.090	19303+1651	Image	Descr	12 GHz (II);	65.0;66.1	65.4	4.3	1.5	Torun_32m	180	+H₂O +CH₃OH II	SFR		2002 June 24 - August 15
21	20 30 50.8	+41 02 25	79.7354	0.9897	G79.736+0.990	20290+4052	Image		12 GHz (II);	-5;-6.4	-5.7	6.5	3.2	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II	SFR		2002 June 24 - August 15
22	21 39 58	+50 14 24	94.6025	-1.7950	G94.603-1.796	21381+5000	Image	Descr	12 GHz (II);	-38.2;-37.2	-37.8	12.3	3.7	Torun_32m	180	+H₂O -CH₃OH I +CH₃OH II -OH -SiO	SFR_MIXED		2002 June 24 - August 15

Distribution of sources in all sky (l,b)

Distribution of sources in all sky using Aladin

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Distribution of sources in IRAS color-color diagram

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Original color diagram is taken form van der Veen & Habing (1987)

Type	Description
I	Oxygen-rich non-variable stars without circumstellar shells
II	Variable stars with "young" O-rich circumstellar shells
IIIa	Variable stars with more evolved O-rich circumstellar shells
IIIb	Variable stars with thick O-rich circumstellar shells
IV	Variable stars with very thick O-rich circumstellar shells
V	Planetary nebulae and non- variable stars with very cool circumstellar shells
VIa	Variable stars with relatively cold dust at large distances; a significant part of the stars is carbon-rich
VIb	Variable stars with relatively hot dust close to the star and relatively cold dust at large distances; Some of the objects have proven to be O-rich
VII	Variable stars with more evolved C-rich circumstellar shells
VIII	Different sort of objects

Distribution of the detection velocities versus galactic longitude from BLA04

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