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GOD07 - Associations of H_2O and CH_3OH masers at milli-arcsec angular resolution in two high-mass YSOs

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Short title: Goddi et al. (2007)
Authors: Goddi, C.Moscadelli, L.Sanna, A.Cesaroni, R.Minier, V.
Journal: Astronomy and Astrophysics, Volume 461, Issue 3, January III 2007, pp.1027-1035
Bibcode:

Target type: High_mass_SFR
Transitions: H2O_22

Abstract
Context: While high-angular resolution observations have clarified that water masers originate from shocks associated with protostellar jets, different environments have been proposed in several sources to explain the origin of CH3OH masers. Aims: We wish to investigate the nature of the CH3OH maser birthplace in SFRs and the association between the H2O and CH3OH maser emission in the same YSO. Methods: We have conducted phase-reference VLBI observations of H2O and CH3OH masers toward two high-mass SFRs, Sh 2-255 IR and AFGL 5142. Results: In Sh 2-255 IR water masers are aligned along a direction close to the orientation of the molecular outflow observed on angular scales of 1-10 arcsec, tracing possibly the disk-wind emerging from the disk atmosphere. In AFGL 5142 water masers trace expansion at the base of a protostellar jet, whilst methanol masers are more probably tracing infalling than outflowing gas. Conclusions: .The results for AFGL 5142 suggest that water and methanol masers trace different kinematic structures in the circumstellar gas.

Abstract

Context: While high-angular resolution observations have clarified that water masers originate from shocks associated with protostellar jets, different environments have been proposed in several sources to explain the origin of CH3OH masers.
Aims: We wish to investigate the nature of the CH3OH maser birthplace in SFRs and the association between the H2O and CH3OH maser emission in the same YSO.
Methods: We have conducted phase-reference VLBI observations of H2O and CH3OH masers toward two high-mass SFRs, Sh 2-255 IR and AFGL 5142.
Results: In Sh 2-255 IR water masers are aligned along a direction close to the orientation of the molecular outflow observed on angular scales of 1-10 arcsec, tracing possibly the disk-wind emerging from the disk atmosphere. In AFGL 5142 water masers trace expansion at the base of a protostellar jet, whilst methanol masers are more probably tracing infalling than outflowing gas.
Conclusions: .The results for AFGL 5142 suggest that water and methanol masers trace different kinematic structures in the circumstellar gas.

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Detection table from Goddi et al. (2007)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Source name	Image	Descr.	Line	V_peak	V_X	V_Y	F_peak	Telescope	V_step	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)						H₂O	(km/s)	(km/s)	(km/s)	(Jy)		(km/s)	(mJy/beam)	(arcsec)	Yes/No		(kpc)
1	+06 12 54.018	+17 59 23.22			192.600274	-0.048004	G192.599-0.048		Sh 2-255 IR	Image	Descr	22 GHz;	1 .. 14.4			0.07 .. 20.9	VLBA	0.2	20.000	0.0007 x 0.0004	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2004 Oct 21 - 2005 Mar 10
	+06 12 54.013	+17 59 23.1122	-75.4 mas	-106.6 mas	192.600291	-0.048036		1	Sh 2-255 IR				12.5	-11 (20)	19 (9)	15.7
	+06 12 54.0127	+17 59 23.1111	-80.2 mas	-107.7 mas	192.600291	-0.048037		2	Sh 2-255 IR				11.9			0.2
	+06 12 54.0123	+17 59 23.0978	-85.9 mas	-121 mas	192.600293	-0.048040		3	Sh 2-255 IR				11.8	-22 (20)	5 (11)	4.5
	+06 12 54.0211	+17 59 23.1208	47 mas	-98 mas	192.600305	-0.048006		4	Sh 2-255 IR				11.5	-13 (20)	11 (9)	0.3
	+06 12 54.0128	+17 59 23.1123	-77.7 mas	-106.5 mas	192.600291	-0.048036		5	Sh 2-255 IR				11	-18 (20)	15 (9)	1.1
	+06 12 54.0218	+17 59 23.2534	57.2 mas	34.6 mas	192.600274	-0.047986		6	Sh 2-255 IR				14.4			0.1
	+06 12 54.0218	+17 59 23.2531	56.8 mas	34.3 mas	192.600274	-0.047986		7	Sh 2-255 IR				14.3			0.1
	+06 12 54.0218	+17 59 23.2188	56.5 mas	0.03 mas	192.600282	-0.047991		8	Sh 2-255 IR				13.1	-12 (20)	41 (9)	0.5
	+06 12 54.0244	+17 59 23.2047	96.6 mas	-14.1 mas	192.600290	-0.047984		9	Sh 2-255 IR				8.7			0.4
	+06 12 54.0265	+17 59 23.2099	127.3 mas	-8.9 mas	192.600293	-0.047976		10	Sh 2-255 IR				8.2			0.4
	+06 12 54.0259	+17 59 23.1046	118.7 mas	-114.2 mas	192.600318	-0.047992		11	Sh 2-255 IR				8.1			0.2
	+06 12 54.0258	+17 59 23.1004	117 mas	-118.4 mas	192.600318	-0.047993		12	Sh 2-255 IR				8			0.09
	+06 12 54.0236	+17 59 23.1972	84.5 mas	-21.6 mas	192.600291	-0.047987		13	Sh 2-255 IR				7.6			0.4
	+06 12 54.0266	+17 59 23.2101	128.3 mas	-8.7 mas	192.600293	-0.047976		14	Sh 2-255 IR				7.6			3.9
	+06 12 54.0249	+17 59 23.2051	103.9 mas	-13.7 mas	192.600291	-0.047982		15	Sh 2-255 IR				7.3			0.5
	+06 12 54.0263	+17 59 23.2088	124.9 mas	-10 mas	192.600293	-0.047976		16	Sh 2-255 IR				7.3			0.4
	+06 12 54.0232	+17 59 23.1994	78.5 mas	-19.4 mas	192.600289	-0.047988		17	Sh 2-255 IR				7.3	12 (20)	25 (9)	2.5
	+06 12 54.0237	+17 59 23.1967	85.2 mas	-22.1 mas	192.600291	-0.047987		18	Sh 2-255 IR				7.2			0.1
	+06 12 54.0253	+17 59 23.2066	109.4 mas	-12.2 mas	192.600292	-0.047980		19	Sh 2-255 IR				6.8			0.2
	+06 12 54.0236	+17 59 23.1971	83.6 mas	-21.7 mas	192.600291	-0.047988		20	Sh 2-255 IR				6.8			0.2
	+06 12 54.0237	+17 59 23.1966	85.9 mas	-22.2 mas	192.600291	-0.047987		21	Sh 2-255 IR				6.5	-12 (20)	25 (9)	0.5
	+06 12 54.0265	+17 59 23.2104	128.1 mas	-8.4 mas	192.600293	-0.047976		22	Sh 2-255 IR				6.5			0.4
	+06 12 54.0267	+17 59 23.2127	131 mas	-6.1 mas	192.600293	-0.047975		23	Sh 2-255 IR				6.4			0.1
	+06 12 54.0257	+17 59 23.2065	115 mas	-12.3 mas	192.600292	-0.047979		24	Sh 2-255 IR				6.3			1.2
	+06 12 54.0259	+17 59 23.2101	118.8 mas	-8.7 mas	192.600292	-0.047978		25	Sh 2-255 IR				6.3			0.1
	+06 12 54.0266	+17 59 23.211	128.4 mas	-7.8 mas	192.600293	-0.047975		26	Sh 2-255 IR				6.2			0.1
	+06 12 54.0274	+17 59 23.2183	140.3 mas	-0.5 mas	192.600293	-0.047972		27	Sh 2-255 IR				6.2			0.07
	+06 12 54.0325	+17 59 23.2732	217.9 mas	54.4 mas	192.600289	-0.047946		28	Sh 2-255 IR				6.2			0.1
	+06 12 54.0248	+17 59 23.2062	102.1 mas	-12.6 mas	192.600291	-0.047982		29	Sh 2-255 IR				6			0.8
	+06 12 54.0226	+17 59 23.2166	68.5 mas	-2.2 mas	192.600284	-0.047989		30	Sh 2-255 IR				5.8	13 (23)	30 (9)	0.9
	+06 12 54.0268	+17 59 23.2131	131.6 mas	-5.7 mas	192.600293	-0.047974		31	Sh 2-255 IR				5.7			1.9
	+06 12 54.0118	+17 59 23.0044	-93.1 mas	-214.4 mas	192.600315	-0.048054		32	Sh 2-255 IR				7.4			0.2
	+06 12 54.0091	+17 59 22.9591	-133.7 mas	-259.7 mas	192.600321	-0.048070		33	Sh 2-255 IR				6.6			0.2
	+06 12 54.0091	+17 59 22.9588	-134.1 mas	-260 mas	192.600321	-0.048070		34	Sh 2-255 IR				5.7			3.9
	+06 12 54.0117	+17 59 23.0039	-94.7 mas	-214.9 mas	192.600315	-0.048055		35	Sh 2-255 IR				5.5			4.9
	+06 12 54.0113	+17 59 23.0001	-101 mas	-218.7 mas	192.600315	-0.048057		36	Sh 2-255 IR				5.4			0.6
	+06 12 54.0085	+17 59 22.9637	-142.3 mas	-255.1 mas	192.600319	-0.048071		37	Sh 2-255 IR				4.8			0.9
	+06 12 54.0089	+17 59 22.957	-136.7 mas	-261.8 mas	192.600321	-0.048071		38	Sh 2-255 IR				4.6			20.9
	+06 12 54.0083	+17 59 22.9627	-145.5 mas	-256.1 mas	192.600319	-0.048072		39	Sh 2-255 IR				4.3			1.1
	+06 12 54.0092	+17 59 22.9614	-131.9 mas	-257.4 mas	192.600321	-0.048069		40	Sh 2-255 IR				4.1			1.2
	+06 12 54.0118	+17 59 23.0044	-93 mas	-214.4 mas	192.600315	-0.048054		41	Sh 2-255 IR				4.1			0.3
	+06 12 54.0074	+17 59 22.9692	-158.3 mas	-249.6 mas	192.600315	-0.048074		42	Sh 2-255 IR				3.9	5 (20)	-17 (10)	2.1
	+06 12 54.0082	+17 59 22.9477	-146.9 mas	-271.1 mas	192.600322	-0.048074		43	Sh 2-255 IR				3.8			0.1
	+06 12 54.0086	+17 59 22.9648	-141.1 mas	-254 mas	192.600319	-0.048071		44	Sh 2-255 IR				3.6	28 (20)	-12 (9)	2.7
	+06 12 54.0092	+17 59 22.9619	-131.8 mas	-256.9 mas	192.600321	-0.048069		45	Sh 2-255 IR				3.4			0.2
	+06 12 54.0093	+17 59 22.9629	-131 mas	-255.9 mas	192.600320	-0.048069		46	Sh 2-255 IR				3			0.08
	+06 12 54.0077	+17 59 22.9817	-154.7 mas	-237.1 mas	192.600313	-0.048072		47	Sh 2-255 IR				2.6			0.1
	+06 12 54.0076	+17 59 22.9686	-155.8 mas	-250.2 mas	192.600316	-0.048074		48	Sh 2-255 IR				2.3			18.7
	+06 12 54.0076	+17 59 22.9688	-155.3 mas	-250 mas	192.600316	-0.048073		49	Sh 2-255 IR				2.2			6.1
	+06 12 54.0096	+17 59 22.976	-126.5 mas	-242.8 mas	192.600318	-0.048066		50	Sh 2-255 IR				2.2	2 (20)	-10 (9)	8.2
	+06 12 54.0076	+17 59 22.9699	-155.8 mas	-248.9 mas	192.600316	-0.048073		51	Sh 2-255 IR				2.1	2 (20)	-10 (9)	0.3
	+06 12 54.0111	+17 59 23.0003	-103 mas	-218.5 mas	192.600315	-0.048057		52	Sh 2-255 IR				1.8			0.3
	+06 12 54.0068	+17 59 22.9701	-167.4 mas	-248.7 mas	192.600314	-0.048076		53	Sh 2-255 IR				1.7			1.9
	+06 12 54.0077	+17 59 22.9686	-155.1 mas	-250.2 mas	192.600316	-0.048073		54	Sh 2-255 IR				1.6			5.6
	+06 12 54.0069	+17 59 22.9694	-166 mas	-249.4 mas	192.600314	-0.048076		55	Sh 2-255 IR				1.3	-2 (20)	-29 (9)	2.3
	+06 12 54.0069	+17 59 22.9696	-166.6 mas	-249.2 mas	192.600314	-0.048076		56	Sh 2-255 IR				1			0.7
	+06 12 54.0449	+17 59 23.3987	403.8 mas	179.9 mas	192.600282	-0.047887		57	Sh 2-255 IR				10.1			0.5

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(h2o_data_all.ra_hms) as ra_hms,MAX(h2o_data_all.dec_dms) as dec_dms,MAX(h2o_data_all.source_name) as source_name,MAX(h2o_data_all.ra) as ra,MAX(h2o_data_all.dec) as dec,MAX(h2o_data_all.l) as l,MAX(h2o_data_all.b) as b,MAX(h2o_data_all.grp) as grp,MAX(h2o_data_all.other_name) as other_name,MAX(h2o_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(h2o_data_all.line) as line,MAX(h2o_data_all.vrange) as vrange,MAX(h2o_data_all.vpeak) as vpeak,MAX(h2o_data_all.peak) as peak,MAX(h2o_data_all.fwhm) as fwhm,MAX(h2o_data_all.int) as int,MAX(h2o_data_all.rms) as rms,MAX(h2o_data_all.units) as units,MAX(h2o_data_all.units_rms) as units_rms,MAX(h2o_data_all.date_txt) as date_txt,MAX(h2o_data_all.telescope_ref) as telescope_ref,MAX(h2o_data_all.telescope_conf) as telescope_conf,MAX(h2o_data_all.v_step) as v_step,MAX(h2o_data_all.beam) as beam,MAX(h2o_data_all.beam_maj) as beam_maj,MAX(h2o_data_all.beam_min) as beam_min,MAX(h2o_data_all.beam_pa) as beam_pa,MAX(h2o_data_all.ref) as ref,MAX(h2o_data_all.list_ref) as list_ref,MAX(h2o_data_all.ascii) as ascii,MAX(h2o_data_all.url) as url,MAX(h2o_data_all.image) as image,MAX(h2o_data_all.image2) as image2,MAX(h2o_data_all.image3) as image3,MAX(h2o_data_all.descr) as descr,MAX(h2o_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(h2o_data_all.dist) as dist,1 as dist_parallax,MAX(h2o_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 h2o_data_all  LEFT JOIN all_objects_withmet ON h2o_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 h2o_data_all.line=transitions."Line"  WHERE ref ilike 'GOD07' AND detected=true AND hide=false GROUP BY ref

select h2o_data_all.ra_hms,h2o_data_all.dec_dms,h2o_data_all.source_name,h2o_data_all.ra,h2o_data_all.dec,h2o_data_all.l,h2o_data_all.b,h2o_data_all.grp,h2o_data_all.other_name,h2o_data_all.other_desc,h2o_data_all.thermal,h2o_data_all.line,h2o_data_all.vrange,h2o_data_all.vpeak,h2o_data_all.peak,h2o_data_all.fwhm,h2o_data_all.int,h2o_data_all.rms,h2o_data_all.units,h2o_data_all.units_rms,h2o_data_all.date_txt,h2o_data_all.telescope_ref,h2o_data_all.telescope_conf,h2o_data_all.v_step,h2o_data_all.beam,h2o_data_all.beam_maj,h2o_data_all.beam_min,h2o_data_all.beam_pa,h2o_data_all.ref,h2o_data_all.list_ref,h2o_data_all.ascii,h2o_data_all.url,h2o_data_all.image,h2o_data_all.image2,h2o_data_all.image3,h2o_data_all.descr,h2o_data_all.id,h2o_data_all.mjy_flag,h2o_data_all.rms_mjy_flag,h2o_data_all.dist,h2o_data_all.dist_parallax,h2o_data_all.date_txt,line_det,type,simbad_types_cat FROM h2o_data_all   LEFT JOIN all_objects_withmet ON h2o_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 h2o_data_all.line=transitions."Line"  WHERE ref ilike 'GOD07' AND detected=true AND hide=false ORDER BY detected DESC,id

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GOD07 - Associations of H_2O and CH_3OH masers at milli-arcsec angular resolution in two high-mass YSOs

Interferometry data

View as list of objects

Detection table from Goddi et al. (2007)