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ARA09 - Radio Continuum and Methanol Observations of DR21(OH)

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Short title: Araya et al. (2009)
Authors: Araya, Esteban D. Kurtz, Stan Hofner, Peter Linz, Hendrik
Journal: The Astrophysical Journal, Volume 698, Issue 2, pp. 1321-1329 (2009).
Bibcode:
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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
We report high-sensitivity subarcsecond angular resolution observations of the massive star-forming region DR21(OH) at 3.6, 1.3, and 0.7 cm obtained with the Very Large Array. In addition, we conducted observations of CH₃OH 44 GHz masers. We detected more than 30 new maser components in the DR21(OH) region. Most of the masers appear to trace a sequence of bow shocks in a bipolar outflow. The centimeter continuum observations reveal a cluster of radio sources the strongest emission is found toward the molecular core MM1. The radio sources in MM1 are located about 5'' north of the symmetry center of the CH₃OH outflow, and therefore they are unlikely to be associated with the outflow. Instead, the driving source of the outflow is likely located in the MM2 core. Although based on circumstantial evidence, the radio continuum from MM1 appears to trace free-free emission from shock-ionized gas in a jet. The orientation of the putative jet in MM1 is approximately parallel to the CH₃OH outflow and almost perpendicular to the large-scale molecular filament that connects DR21 and DR21(OH). This suggests that the (accretion) disks associated with the outflows/jets in the DR21-DR21(OH) region have symmetry axes mostly perpendicular to the filament. eprintid: arXiv:0904.4086

Abstract

We report high-sensitivity subarcsecond angular resolution observations of the massive star-forming region DR21(OH) at 3.6, 1.3, and 0.7 cm obtained with the Very Large Array. In addition, we conducted observations of CH₃OH 44 GHz masers. We detected more than 30 new maser components in the DR21(OH) region. Most of the masers appear to trace a sequence of bow shocks in a bipolar outflow. The centimeter continuum observations reveal a cluster of radio sources the strongest emission is found toward the molecular core MM1. The radio sources in MM1 are located about 5'' north of the symmetry center of the CH₃OH outflow, and therefore they are unlikely to be associated with the outflow. Instead, the driving source of the outflow is likely located in the MM2 core. Although based on circumstantial evidence, the radio continuum from MM1 appears to trace free-free emission from shock-ionized gas in a jet. The orientation of the putative jet in MM1 is approximately parallel to the CH₃OH outflow and almost perpendicular to the large-scale molecular filament that connects DR21 and DR21(OH). This suggests that the (accretion) disks associated with the outflows/jets in the DR21-DR21(OH) region have symmetry axes mostly perpendicular to the filament. eprintid:

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Detection table from Araya et al. (2009)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Maser spot	Source name	Image	Line	V_peak	F_peak	∫F dv	Telescope	Beam	PA	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)						CH₃OH (class I)	(km/s)	(Jy/beam)	(Jy/beam*km/s)		(arcsec)	(deg.)	Yes/No		(kpc)
1	+20 39 0.9	+42 22 47			81.721095	0.571066	G81.718+0.571			DR21(OH)	Image	44 GHz (I);	-8.3 .. 1.7	0.064 .. 76.8	0.073 .. 79.3	NRAOVLA	0.92 x 0.74	74.9	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR		Sep 07, 2001
	+20 38 58.68	+42 22 22.1	-33300 mas	-24899.2 mas	81.711448	0.572283		1	CH3OH-1	DR21(OH)			-1.7	0.4	0.41
	+20 38 58.92	+42 22 27.2	-29700 mas	-19799.2 mas	81.713022	0.572558		2	CH3OH-2	DR21(OH)			-6.3	0.39	0.92
	+20 38 59.29	+42 22 48.8	-24150 mas	1800.8 mas	81.718478	0.575303		3	CH3OH-3	DR21(OH)			0.3	76.8	79.3
	+20 38 59.32	+42 22 49.6	-23700 mas	2600.8 mas	81.718710	0.575365		4	CH3OH-4	DR21(OH)			1	2.95	3.28
	+20 38 59.35	+42 22 47.4	-23250 mas	400.8 mas	81.718281	0.574920		5	CH3OH-5	DR21(OH)			-1.7	2.05	2.68
	+20 38 59.56	+42 23 5.3	-20100 mas	18300.8 mas	81.722622	0.577431		6	CH3OH-6	DR21(OH)			-1	0.49	0.57
	+20 38 59.64	+42 22 47.2	-18900 mas	200.8 mas	81.718780	0.574178		7	CH3OH-7	DR21(OH)			-0.3	0.092	0.16
	+20 38 59.72	+42 22 49.6	-17700 mas	2600.8 mas	81.719459	0.574388		8	CH3OH-8	DR21(OH)			-0.3	0.27	0.29
	+20 38 59.73	+42 23 16.2	-17550 mas	29200.8 mas	81.725344	0.578857		9	CH3OH-9	DR21(OH)			-0.3	0.27	0.49
	+20 38 59.73	+42 22 47.6	-17550 mas	600.8 mas	81.719037	0.574025		10	CH3OH-10	DR21(OH)			-0.3	0.12	0.12
	+20 38 59.76	+42 22 45.5	-17100 mas	-1499.2 mas	81.718630	0.573597		11	CH3OH-11	DR21(OH)			-0.3	0.23	0.37
	+20 38 59.83	+42 22 50.1	-16050 mas	3100.8 mas	81.719775	0.574203		12	CH3OH-12	DR21(OH)			-1.7	0.14	0.23
	+20 38 59.89	+42 22 46	-15150 mas	-999.2 mas	81.718984	0.573364		13	CH3OH-13	DR21(OH)			-0.3	3.01	3.93
	+20 38 59.92	+42 22 47.9	-14700 mas	900.8 mas	81.719459	0.573612		14	CH3OH-14	DR21(OH)			-0.3	0.12	0.18
	+20 38 59.92	+42 22 50.3	-14700 mas	3300.8 mas	81.719988	0.574017		15	CH3OH-15	DR21(OH)			-1	0.21	0.28
	+20 38 59.93	+42 22 45	-14550 mas	-1999.2 mas	81.718838	0.573098		16	CH3OH-16	DR21(OH)			0.3	5.27	6.07
	+20 38 59.99	+42 22 35.2	-13650 mas	-11799.2 mas	81.716789	0.571295		17	CH3OH-17	DR21(OH)			-2.3	0.16	0.14
	+20 39 0.08	+42 22 47.1	-12300 mas	100.8 mas	81.719582	0.573086		18	CH3OH-18	DR21(OH)			-1.7	0.26	0.38
	+20 39 0.09	+42 22 44.7	-12150 mas	-2299.2 mas	81.719071	0.572656		19	CH3OH-19	DR21(OH)			-8.3	0.14	0.16
	+20 39 0.12	+42 22 43.7	-11700 mas	-3299.2 mas	81.718907	0.572414		20	CH3OH-20	DR21(OH)			-5.6	0.38	0.42
	+20 39 0.13	+42 22 47.1	-11550 mas	100.8 mas	81.719675	0.572964		21	CH3OH-21	DR21(OH)			-0.3	0.43	0.83
	+20 39 0.14	+42 22 48.8	-11400 mas	1800.8 mas	81.720069	0.573226		22	CH3OH-22	DR21(OH)			-3	0.081	0.19
	+20 39 0.19	+42 22 47.7	-10650 mas	700.8 mas	81.719920	0.572918		23	CH3OH-23	DR21(OH)			-1.7	3.26	3.48
	+20 39 0.26	+42 22 46	-9600 mas	-999.2 mas	81.719676	0.572460		24	CH3OH-24	DR21(OH)			-0.3	21.3	25.7
	+20 39 0.29	+42 22 47.4	-9150 mas	400.8 mas	81.720041	0.572623		25	CH3OH-25	DR21(OH)			-0.3	5.74	7.1
	+20 39 0.33	+42 22 48.5	-8550 mas	1500.8 mas	81.720359	0.572712		26	CH3OH-26	DR21(OH)			-1	0.15	0.23
	+20 39 0.49	+42 22 46.3	-6150 mas	-699.2 mas	81.720173	0.571949		27	CH3OH-27	DR21(OH)			-3	0.097	0.14
	+20 39 0.55	+42 22 47.7	-5250 mas	700.8 mas	81.720594	0.572039		28	CH3OH-28	DR21(OH)			1.7	1.08	1.47
	+20 39 0.6	+42 22 45	-4500 mas	-1999.2 mas	81.720092	0.571461		29	CH3OH-29	DR21(OH)			-2.3	0.12	0.2
	+20 39 1.05	+42 22 41.6	2250 mas	-5399.2 mas	81.720185	0.569787		30	CH3OH-30	DR21(OH)			-1.7	0.29	0.4
	+20 39 1.05	+42 22 17.6	2250 mas	-29399.2 mas	81.714893	0.565732		31	CH3OH-31	DR21(OH)			-3.7	0.34	0.37
	+20 39 1.09	+42 22 01	2850 mas	-45999.2 mas	81.711308	0.562830		32	CH3OH-32	DR21(OH)			-2.3	2.21	2.51
	+20 39 1.17	+42 22 6.8	4050 mas	-40199.2 mas	81.712736	0.563614		33	CH3OH-33	DR21(OH)			-1	0.59	0.82
	+20 39 1.18	+42 22 6.8	4200 mas	-40199.2 mas	81.712755	0.563590		34	CH3OH-34	DR21(OH)			-3.7	0.88	1.41
	+20 39 1.22	+42 22 41.2	4800 mas	-5799.2 mas	81.720415	0.569304		35	CH3OH-35	DR21(OH)			-3	0.58	0.75
	+20 39 1.47	+42 23 6.3	8550 mas	19300.8 mas	81.726418	0.572934		36	CH3OH-36	DR21(OH)			-2.3	0.064	0.073
	+20 39 1.48	+42 22 7.6	8700 mas	-39399.2 mas	81.713493	0.562992		37	CH3OH-37	DR21(OH)			-4.3	0.78	0.96
	+20 39 1.5	+42 22 45.2	9000 mas	-1799.2 mas	81.721821	0.569296		38	CH3OH-38	DR21(OH)			-3	0.66	0.85
	+20 39 1.51	+42 22 40.8	9150 mas	-6199.2 mas	81.720870	0.568528		39	CH3OH-39	DR21(OH)			-5	4.68	6.07
	+20 39 1.54	+42 22 2.8	9600 mas	-44199.2 mas	81.712547	0.562034		40	CH3OH-40	DR21(OH)			-3.7	0.76	1
	+20 39 1.67	+42 22 43.4	11550 mas	-3599.2 mas	81.721743	0.568576		41	CH3OH-41	DR21(OH)			-6.3	2.5	3.05
	+20 39 1.7	+42 22 45.2	12000 mas	-1799.2 mas	81.722196	0.568807		42	CH3OH-42	DR21(OH)			-5	0.3	0.38
	+20 39 1.76	+42 22 45.3	12900 mas	-1699.2 mas	81.722330	0.568677		43	CH3OH-43	DR21(OH)			-3.7	0.21	0.2
	+20 39 2.02	+42 22 41.2	16800 mas	-5799.2 mas	81.721913	0.567349		44	CH3OH-44	DR21(OH)			-4.3	2.23	2.62
	+20 39 2.02	+42 22 40.8	16800 mas	-6199.2 mas	81.721825	0.567282		45	CH3OH-45	DR21(OH)			-5.6	1.94	1.82
	+20 39 2.08	+42 22 45.2	17700 mas	-1799.2 mas	81.722907	0.567879		46	CH3OH-46	DR21(OH)			-3.7	6.29	6.45
	+20 39 2.21	+42 22 43.4	19650 mas	-3599.2 mas	81.722754	0.567257		47	CH3OH-47	DR21(OH)			-4.3	0.32	0.3
	+20 39 2.22	+42 22 42.6	19800 mas	-4399.2 mas	81.722596	0.567097		48	CH3OH-48	DR21(OH)			-3.7	1.82	1.8
	+20 39 2.24	+42 22 44	20100 mas	-2999.2 mas	81.722942	0.567285		49	CH3OH-49	DR21(OH)			-5	8.77	12.5

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(met1_data_all.ra_hms) as ra_hms,MAX(met1_data_all.dec_dms) as dec_dms,MAX(met1_data_all.source_name) as source_name,MAX(met1_data_all.ra) as ra,MAX(met1_data_all.dec) as dec,MAX(met1_data_all.l) as l,MAX(met1_data_all.b) as b,MAX(met1_data_all.grp) as grp,MAX(met1_data_all.other_name) as other_name,MAX(met1_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met1_data_all.line) as line,MAX(met1_data_all.vrange) as vrange,MAX(met1_data_all.vpeak) as vpeak,MAX(met1_data_all.peak) as peak,MAX(met1_data_all.fwhm) as fwhm,MAX(met1_data_all.int) as int,MAX(met1_data_all.rms) as rms,MAX(met1_data_all.units) as units,MAX(met1_data_all.units_rms) as units_rms,MAX(met1_data_all.date_txt) as date_txt,MAX(met1_data_all.telescope_ref) as telescope_ref,MAX(met1_data_all.telescope_conf) as telescope_conf,MAX(met1_data_all.v_step) as v_step,MAX(met1_data_all.beam) as beam,MAX(met1_data_all.beam_maj) as beam_maj,MAX(met1_data_all.beam_min) as beam_min,MAX(met1_data_all.beam_pa) as beam_pa,MAX(met1_data_all.ref) as ref,MAX(met1_data_all.list_ref) as list_ref,MAX(met1_data_all.ascii) as ascii,MAX(met1_data_all.url) as url,MAX(met1_data_all.image) as image,MAX(met1_data_all.image2) as image2,MAX(met1_data_all.image3) as image3,MAX(met1_data_all.descr) as descr,MAX(met1_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met1_data_all.dist) as dist,1 as dist_parallax,MAX(met1_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 met1_data_all  LEFT JOIN all_objects_withmet ON met1_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 met1_data_all.line=transitions."Line"  WHERE ref ilike 'ARA09' AND detected=true AND hide=false GROUP BY ref

select met1_data_all.ra_hms,met1_data_all.dec_dms,met1_data_all.source_name,met1_data_all.ra,met1_data_all.dec,met1_data_all.l,met1_data_all.b,met1_data_all.grp,met1_data_all.other_name,met1_data_all.other_desc,met1_data_all.thermal,met1_data_all.line,met1_data_all.vrange,met1_data_all.vpeak,met1_data_all.peak,met1_data_all.fwhm,met1_data_all.int,met1_data_all.rms,met1_data_all.units,met1_data_all.units_rms,met1_data_all.date_txt,met1_data_all.telescope_ref,met1_data_all.telescope_conf,met1_data_all.v_step,met1_data_all.beam,met1_data_all.beam_maj,met1_data_all.beam_min,met1_data_all.beam_pa,met1_data_all.ref,met1_data_all.list_ref,met1_data_all.ascii,met1_data_all.url,met1_data_all.image,met1_data_all.image2,met1_data_all.image3,met1_data_all.descr,met1_data_all.id,met1_data_all.mjy_flag,met1_data_all.rms_mjy_flag,met1_data_all.dist,met1_data_all.dist_parallax,met1_data_all.date_txt,line_det,type,simbad_types_cat FROM met1_data_all   LEFT JOIN all_objects_withmet ON met1_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 met1_data_all.line=transitions."Line"  WHERE ref ilike 'ARA09' AND detected=true AND hide=false ORDER BY detected DESC,id

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ARA09 - Radio Continuum and Methanol Observations of DR21(OH)

Interferometry data

View as list of objects

Detection table from Araya et al. (2009)