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HIR08 - Astrometry of H₂O Masers in Nearby Star-Forming Regions with VERA III. IRAS 22198+6336 in Lynds1204G

Interferometry data

Short title: Hirota et al. (2008)
Authors: Hirota, TomoyaAndo, KazumaBushimata, TakeshiChoi, Yoon KyungHonma, MarekiImai, HiroshiIwadate, KenzaburoJike, TakaakiKameno, SeijiKameya, OsamuKamohara, RyuichiKan-Ya, YukitoshiKawaguchi, NoriyukiKijima, MasachikaKim, Mi KyoungKobayashi, HideyukiKuji, SeisukeKurayama, TomoharuManabe, SeijiMatsui, MakotoMatsumoto, NaokoMiyaji, TakeshiMiyazaki, AtsushiNagayama, TakumiNakagawa, AkiharuNamikawa, DaichiNyu, DaisukeOh, Chung SikOmodaka, ToshihiroOyama, TomoakiSakai, SatoshiSasao, TetsuoSato, KatsuhisaSato, MayumiShibata, Katsunori M.Tamura, YoshiakiUeda, KosukeYamashita, Kazuyoshi
Journal: Publications of the Astronomical Society of Japan, Vol.60, No.5, pp.961--974
Bibcode:

Target type: High_mass_SFR

Abstract
We present results of multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22GHz H₂O masers associated with a young stellar object (YSO) IRAS 22198+6336 in a dark cloud, L1204G. Based on phase-referencing VLBI astrometry, we derived an annual parallax of IRAS 22198+6336 to be 1.309Â�0.047 mas, corresponding to the distance of 764Â�27pc from the Sun. Although the most principal error source of our astrometry is attributed to the internal structure of the maser spots, we successfully reduced the errors in the derived annual parallax by employing position measurements for all of the 26 detected maser spots. Based on this result, we reanalyzed the spectral energy distribution of IRAS 22198+6336 and found that the bolometric luminosity and total mass of IRAS 22198+6336 are 450L_odot and 7M_odot, respectively. These values are consistent with an intermediate-mass YSO deeply embedded in the dense dust core, which has been proposed to be an intermediate-mass counterpart of a low-mass Class 0 source. In addition, we obtained absolute proper motions of the H₂O masers for the most blue-shifted components. We propose that the collimated jets aligned along the east-west direction are the most plausible explanation for the origin of the detected maser features.

Abstract

We present results of multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22GHz H₂O masers associated with a young stellar object (YSO) IRAS 22198+6336 in a dark cloud, L1204G. Based on phase-referencing VLBI astrometry, we derived an annual parallax of IRAS 22198+6336 to be 1.309Â�0.047 mas, corresponding to the distance of 764Â�27pc from the Sun. Although the most principal error source of our astrometry is attributed to the internal structure of the maser spots, we successfully reduced the errors in the derived annual parallax by employing position measurements for all of the 26 detected maser spots. Based on this result, we reanalyzed the spectral energy distribution of IRAS 22198+6336 and found that the bolometric luminosity and total mass of IRAS 22198+6336 are 450L_odot and 7M_odot, respectively. These values are consistent with an intermediate-mass YSO deeply embedded in the dense dust core, which has been proposed to be an intermediate-mass counterpart of a low-mass Class 0 source. In addition, we obtained absolute proper motions of the H₂O masers for the most blue-shifted components. We propose that the collimated jets aligned along the east-west direction are the most plausible explanation for the origin of the detected maser features.

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Detection table from Hirota et al. (2008)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Source name	Image	Descr.	Line	V_peak	μ_X	μ_Y	F_peak	Telescope	V_step	Beam	PA	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)						H₂O	(km/s)	(mas/yr)	(mas/yr)	(Jy/beam)		(km/s)	(arcsec)	(deg.)	Yes/No		(kpc)
1	+22 21 26.7279	+63 51 37.9239			107.2981486	5.6397399	G107.300+5.640		IRAS 22198+6336	Image	Descr	22 GHz;					VERA	0.21	1.2 x 0.9	-40	+H₂O -CH₃OH I +CH₃OH II	SFR	0.764 (0.027)	2006 Nov - 2007 Dec
	+22 21 26.747474	+63 51 37.98406	293.43 mas	60.22 mas	107.298188	5.639734		1	IRAS 22198+6336				-3.15			1.9
	+22 21 26.7480653	+63 51 37.97103	302.3 mas	47.19 mas	107.298187	5.639731		2	IRAS 22198+6336				-3.57			0.74
	+22 21 26.73934	+63 51 37.79584	171.42 mas	-128 mas	107.298147	5.639699		3	IRAS 22198+6336				-8.2			3.9
	+22 21 26.739502	+63 51 37.78279	173.85 mas	-141.05 mas	107.298145	5.639695		4	IRAS 22198+6336				-8.41			2.2
	+22 21 26.7395607	+63 51 37.78765	174.73 mas	-136.19 mas	107.298146	5.639697		5	IRAS 22198+6336				-8.83			2.7
	+22 21 26.7303707	+63 51 38.06965	36.88 mas	145.81 mas	107.298175	5.639771		6	IRAS 22198+6336				-9.68			11.5
	+22 21 26.7262727	+63 51 38.13127	-24.59 mas	207.43 mas	107.298178	5.639790		7	IRAS 22198+6336				-13.05			1.9
	+22 21 26.727564	+63 51 38.12305	-5.22 mas	199.21 mas	107.298178	5.639787		8	IRAS 22198+6336				-14.31			15.7
	+22 21 26.7252853	+63 51 38.14197	-39.4 mas	218.13 mas	107.298178	5.639793		9	IRAS 22198+6336				-14.31			7.2
	+22 21 26.7281887	+63 51 37.90067	4.15 mas	-23.17 mas	107.298146	5.639734		10	IRAS 22198+6336				-16.42	-2.33 (25)	-2.32 (32)	3.7
	+22 21 26.728188	+63 51 37.90053	4.14 mas	-23.31 mas	107.298145	5.639734		11	IRAS 22198+6336				-16.63	-2.48 (25)	-2.20 (32)	6.4
	+22 21 26.7281807	+63 51 37.90051	4.03 mas	-23.33 mas	107.298145	5.639734		12	IRAS 22198+6336				-16.84	-2.27 (25)	-2.10 (32)	3
	+22 21 26.7288593	+63 51 37.94444	14.21 mas	20.6 mas	107.298153	5.639744		13	IRAS 22198+6336				-17.05	-2.02 (168)	3.00 (213)	2.7
	+22 21 26.7289473	+63 51 37.94432	15.53 mas	20.48 mas	107.298153	5.639744		14	IRAS 22198+6336				-17.26	-0.99 (83)	3.18 (105)	4.7
	+22 21 26.728946	+63 51 37.94428	15.51 mas	20.44 mas	107.298153	5.639744		15	IRAS 22198+6336				-17.47	-0.58 (83)	3.71 (105)	8.2
	+22 21 26.728944	+63 51 37.9443	15.48 mas	20.46 mas	107.298153	5.639744		16	IRAS 22198+6336				-17.68	-0.55 (83)	3.71 (105)	8.5
	+22 21 26.728946	+63 51 37.9443	15.51 mas	20.46 mas	107.298153	5.639744		17	IRAS 22198+6336				-17.89	-0.40 (83)	3.79 (105)	6.8
	+22 21 26.7289533	+63 51 37.9442	15.62 mas	20.36 mas	107.298153	5.639744		18	IRAS 22198+6336				-18.1	-1.29 (88)	3.80 (110)	2.7
	+22 21 26.727846	+63 51 37.91196	-0.99 mas	-11.88 mas	107.298147	5.639737		19	IRAS 22198+6336				-17.68	-1.45 (83)	-2.63 (105)	12.8
	+22 21 26.7278487	+63 51 37.9119	-0.95 mas	-11.94 mas	107.298147	5.639737		20	IRAS 22198+6336				-17.89	-2.53 (83)	-1.85 (105)	10.1
	+22 21 26.727844	+63 51 37.91207	-1.02 mas	-11.77 mas	107.298147	5.639737		21	IRAS 22198+6336				-18.1	-2.00 (83)	-2.44 (105)	2.5
	+22 21 26.727852	+63 51 37.92044	-0.9 mas	-3.4 mas	107.298148	5.639739		22	IRAS 22198+6336				-17.05	-3.44 (41)	-2.00 (50)	19.6
	+22 21 26.7278533	+63 51 37.92047	-0.88 mas	-3.37 mas	107.298148	5.639739		23	IRAS 22198+6336				-17.26	-3.45 (41)	-1.23 (50)	60.2
	+22 21 26.727854	+63 51 37.92031	-0.87 mas	-3.53 mas	107.298148	5.639739		24	IRAS 22198+6336				-17.47	-3.43 (41)	-1.35 (50)	48.8
	+22 21 26.7278107	+63 51 37.91836	-1.52 mas	-5.48 mas	107.298148	5.639739		25	IRAS 22198+6336				-17.68	-2.98 (55)	-0.75 (69)	10.4
	+22 21 26.7278113	+63 51 37.91837	-1.51 mas	-5.47 mas	107.298148	5.639739		26	IRAS 22198+6336				-17.89	-2.96 (55)	-0.26 (69)	8.9
	+22 21 26.727904	+63 51 37.91809	-0.12 mas	-5.75 mas	107.298148	5.639739		27	IRAS 22198+6336				-18.1	-3.73 (98)	0.70 (125)	0.6
	+22 21 26.7278667	+63 51 37.92202	-0.68 mas	-1.82 mas	107.298148	5.639740		28	IRAS 22198+6336				-17.47	-3.49 (45)	0.26 (55)	42.6
	+22 21 26.727864	+63 51 37.92156	-0.72 mas	-2.28 mas	107.298148	5.639739		29	IRAS 22198+6336				-17.68	-3.44 (45)	1.11 (55)	20.4
	+22 21 26.7279067	+63 51 37.92129	-0.0799999 mas	-2.55 mas	107.298148	5.639739		30	IRAS 22198+6336				-17.89	-3.28 (98)	0.83 (125)	1.2
	+22 21 26.7277467	+63 51 37.92117	-2.48 mas	-2.67 mas	107.298148	5.639739		31	IRAS 22198+6336				-18.1	-0.90 (55)	0.30 (69)	3.3
	+22 21 26.7278773	+63 51 37.92349	-0.52 mas	-0.35 mas	107.298148	5.639740		32	IRAS 22198+6336				-17.05	-3.89 (45)	-0.01 (56)	2.7
	+22 21 26.7278787	+63 51 37.92345	-0.5 mas	-0.39 mas	107.298148	5.639740		33	IRAS 22198+6336				-17.68	-3.39 (78)	0.80 (96)	175.7
	+22 21 26.7278807	+63 51 37.92362	-0.47 mas	-0.22 mas	107.298149	5.639740		34	IRAS 22198+6336				-17.89	-3.62 (60)	-0.24 (72)	146.1
	+22 21 26.727882	+63 51 37.92363	-0.45 mas	-0.21 mas	107.298149	5.639740		35	IRAS 22198+6336				-18.1	-3.24 (78)	0.99 (96)	59.5

DSS colored	2MASS colored	WISE colored
SDSS color	IRAC color I1,I2,I4	GLIMPSE 360
PACS color (70-160 um)	SPIRE color (250-500 um)	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 'HIR08' 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 'HIR08' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

HIR08 - Astrometry of H2O Masers in Nearby Star-Forming Regions with VERA III. IRAS 22198+6336 in Lynds1204G

Interferometry data

View as list of objects

Detection table from Hirota et al. (2008)

HIR08 - Astrometry of H₂O Masers in Nearby Star-Forming Regions with VERA III. IRAS 22198+6336 in Lynds1204G