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POL10 - Class I Methanol Emission Around DR 21 (OH)

Short title: Polushkin & Valtts (2010)
Authors: Polushkin, S. V. Val'tts, I. E.
Journal: Astronomy Reports, Volume 54, Issue 6, pp.496-508
Bibcode:

Non-detection table: Show non-detection table
Detection table: Show detection table (36 detection)
Target type: High_mass_SFR
Transitions: OH_1665,SiO_1-0v0,CH3OH_9(I),CH3OH_23.4(I),CH3OH_25-30_GHz(I),CH3OH_36(I),CH3OH_44(I),CH3OH_95(I),CH3OH_132(I),CH3OH_6(II),CH3OH_23.1(II)

Abstract
Results of new observations of the vicinity of DR 21 (OH) conducted on the 20-m Onsala radio telescope are presented. The goal was to search for associations between molecular hydrogen emission tracing shock waves and class I methanol maser emission. Observations at 44 and 36 GHz have shown that an extensive region of faint methanol maser emission elongated North-South is probably present in the vicinity of DR 21(OH). The linear size of this structure may be a factor of ten larger than the central region in DR 21(OH) that emits at 44 GHz. Three maser emission peaks are clearly visible in the northern (DR 21N), central (DR 21(OH)), and southern (vicinity of DR 21 West) parts of this structure. Many other structures are also embedded in this region, including the protostellar disk ERO 3 previously detected at 6.7 GHz. Maser components of these objects are formed with velocities from -5 to-2 km/s, with a velocity gradient from -5 in the North to -2 km/s in the South. The spatial resolution of the map is not high enough to distinguish fine structures at 44 GHz associated with spots and jets emitting in molecular hydrogen.	Target sources: Notation from Davis et al. (2007) Comments: Maser spot ERO3 is removed because coordinates is not defined in article

Abstract

Results of new observations of the vicinity of DR 21 (OH) conducted on the 20-m Onsala radio telescope are presented. The goal was to search for associations between molecular hydrogen emission tracing shock waves and class I methanol maser emission. Observations at 44 and 36 GHz have shown that an extensive region of faint methanol maser emission elongated North-South is probably present in the vicinity of DR 21(OH). The linear size of this structure may be a factor of ten larger than the central region in DR 21(OH) that emits at 44 GHz. Three maser emission peaks are clearly visible in the northern (DR 21N), central (DR 21(OH)), and southern (vicinity of DR 21 West) parts of this structure. Many other structures are also embedded in this region, including the protostellar disk ERO 3 previously detected at 6.7 GHz. Maser components of these objects are formed with velocities from -5 to-2 km/s, with a velocity gradient from -5 in the North to -2 km/s in the South. The spatial resolution of the map is not high enough to distinguish fine structures at 44 GHz associated with spots and jets emitting in molecular hydrogen.

Target sources:
Notation from Davis et al. (2007)

Comments:
Maser spot ERO3 is removed because coordinates is not defined in article

Input tables: Table 1-3
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Detection table from Polushkin & Valtts (2010)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Other name	Line	V_peak	FWHM	F_peak	∫F dv	Telescope	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)			Comp	CH₃OH (class I)	(km/s)	(km/s)	(Jy)	(Jy*km/s)		(arcsec)	Yes/No		(kpc)
1	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B9-1 h	1	36 GHz (I);	-5.5	1.2	4.5	5.7	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B9-1 h	2	36 GHz (I);	-4.3	0.8	3.9	3.3	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B9-1 h	3	36 GHz (I);	-3.1	1.2	6.3	8	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B9-1 h	4	36 GHz (I);	0.4	1.2	13.4	17	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
5	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-1	1	36 GHz (I);	-4.7	1.4	7.1	10.5	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-1	2	36 GHz (I);	-3.5	1.1	4.5	5.2	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-1	3	36 GHz (I);	-2.9	0.3	2.5	0.8	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-1	4	36 GHz (I);	-1.9	3.3	6.4	22.4	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-1	5	36 GHz (I);	0.1	0.8	8.4	7.1	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
10	20 38 58.3	+42 21 09	81.6946	0.5609	G81.711+0.563	B4-1	1	36 GHz (I);	-4.2	0.9	8.5	8.1	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 58.3	+42 21 09	81.6946	0.5609	G81.711+0.563	B4-1	2	36 GHz (I);	-3.3	0.6	8.9	5.7	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
12	20 38 59.9	+42 20 51	81.6936	0.5539	G81.711+0.563	B3-1	1	36 GHz (I);	-4.3	0.4	4.6	1.9	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 59.9	+42 20 51	81.6936	0.5539	G81.711+0.563	B3-1	2	36 GHz (I);	-3.5	1	4.4	4.7	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 59.9	+42 20 51	81.6936	0.5539	G81.711+0.563	B3-1	3	36 GHz (I);	-2.6	0.3	1.8	0.6	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
15	20 38 53.1	+42 20 08	81.6714	0.5633	G81.711+0.563	B1-1 : B1-3	1	36 GHz (I);	-2.8	0.7	9.5	7	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
16	20 38 54.8	+42 19 21.8	81.6644	0.5514	G81.711+0.563	DR 21West	1	36 GHz (I);	-2.7	0.6	23.2	14.7	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 54.8	+42 19 21.8	81.6644	0.5514	G81.711+0.563	DR 21West	2	36 GHz (I);	-1.6	1.2	5.6	7.1	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 54.8	+42 19 21.8	81.6644	0.5514	G81.711+0.563	DR 21West	3	36 GHz (I);	-0.5	0.3	4.1	1.3	ONSALA	105	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
19	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B 9-1 h	1	44 GHz (I);	-4.7	0.5	34.2	19.6	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B 9-1 h	2	44 GHz (I);	-3.9	0.5	11	6	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B 9-1 h	3	44 GHz (I);	-3.5	0.3	7	2.6	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 4.6	+42 26 7.8	81.7723	0.5960	G81.767+0.596	B 9-1 h	4	44 GHz (I);	-2.5	0.5	14.6	7.9	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
23	20 39 02	+42 25 43	81.7620	0.5981	G81.767+0.596	DR21N	1	44 GHz (I);	-4.6	0.3	35.2	10.5	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 02	+42 25 43	81.7620	0.5981	G81.767+0.596	DR21N	2	44 GHz (I);	-3.6	0.2	2	0.5	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
	20 39 02	+42 25 43	81.7620	0.5981	G81.767+0.596	DR21N		44 GHz (I);	-2.6	0.4	7.3	2.4	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2007-2008
26	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-3	1	44 GHz (I);	0.1	0.9	8.7	8.3	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B6-3	2	44 GHz (I);	1.2	0.3	10.3	2.2	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
28	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B 6-1	1	44 GHz (I);	0.4	0.6	147	93.4	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 0.2	+42 23 02	81.7231	0.5753	G81.711+0.563	B 6-1	2	44 GHz (I);	0.9	0.4	101	42.8	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
30	20 39 2.2	+42 22 43.9	81.7229	0.5673	G81.711+0.563	DR 21(OH)	1	44 GHz (I);	0.4	0.6	212.2	135	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 39 2.2	+42 22 43.9	81.7229	0.5673	G81.711+0.563	DR 21(OH)	2	44 GHz (I);	0.9	0.4	150.4	63.7	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
32	20 38 58.3	+42 21 09	81.6946	0.5609	G81.711+0.563	B4-1	1	44 GHz (I);	-4	0.7	7.1	5.2	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 58.3	+42 21 09	81.6946	0.5609	G81.711+0.563	B4-1	2	44 GHz (I);	-2	0.7	11.1	8.2	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
	20 38 58.3	+42 21 09	81.6946	0.5609	G81.711+0.563	B4-1	3	44 GHz (I);	0.6	0.9	8.1	7.7	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
35	20 38 53.1	+42 20 08	81.6714	0.5633	G81.711+0.563	B 1-1 : B 1-3	1	44 GHz (I);	-2	0.8	16.1	13.6	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008
36	20 38 54.8	+42 19 21.8	81.6644	0.5514	G81.711+0.563	DR 21 West	1	44 GHz (I);	-2.1	0.5	174	92.2	ONSALA	88	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		2007-2008

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 POL10

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