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HIR08B - Astrometry of H₂O Masers in Nearby Star-Forming Regions with VERA. II. SVS13 in NGC1333

Short title: Hirota et al. (2008b)
Authors: Hirota, TomoyaBushimata, TakeshiChoi, Yoon KyungHonma, MarekiImai, HiroshiIwadate, KenzaburoJike, TakaakiKameya, OsamuKamohara, RyuichiKan-Ya, YukitoshiKawaguchi, NoriyukiKijima, MasachikaKobayashi, HideyukiKuji, SeisukeKurayama, TomoharuManabe, SeijiMiyaji, TakeshiNagayama, TakumiNakagawa, AkiharuOh, Chung SikOmodaka, ToshihiroOyama, TomoakiSakai, SatoshiSasao, TetsuoSato, KatsuhisaShibata, Katsunori M.Tamura, YoshiakiYamashita, Kazuyoshi
Journal: Publications of the Astronomical Society of Japan, Vol.60, No.1, pp.37--44
Bibcode:

Target type: Low_mass_SFR

Abstract
We report on the results of multiepoch very long baseline interferometry (VLBI) observations with VERA (VLBI Exploration of Radio Astrometry) of the 22 GHz H₂O masers associated with the young stellar object SVS13 in the NGC1333 region. We carried out phase-referencing VLBI astrometry, and measured the annual parallax of the maser features in SVS13 of 4.25 �0.32 mas, corresponding to a distance of 235 � 18 pc from the Sun. Our result is consistent with a photometric distance of 220pc, previously reported. Even though the maser features were detectable only for 6 months, the present result provides the distance to NGC1333 with much higher accuracy than photometric methods. The absolute positions and proper motions have been derived, revealing that the H₂O masers with LSR (local standard of rest) velocities of 7-8kms^-1are most likely associated with VLA4A, which is a radio counterpart of SVS13. It is currently difficult to attribute the observed proper motions of the maser features to either the jet or the rotating circumstellar disk associated with VLA4A, which should be investigated through future high-resolution astrometric observations of VLA4A and other radio sources in NGC1333.

Abstract

We report on the results of multiepoch very long baseline interferometry (VLBI) observations with VERA (VLBI Exploration of Radio Astrometry) of the 22 GHz H₂O masers associated with the young stellar object SVS13 in the NGC1333 region. We carried out phase-referencing VLBI astrometry, and measured the annual parallax of the maser features in SVS13 of 4.25 �0.32 mas, corresponding to a distance of 235 � 18 pc from the Sun. Our result is consistent with a photometric distance of 220pc, previously reported. Even though the maser features were detectable only for 6 months, the present result provides the distance to NGC1333 with much higher accuracy than photometric methods. The absolute positions and proper motions have been derived, revealing that the H₂O masers with LSR (local standard of rest) velocities of 7-8kms^-1are most likely associated with VLA4A, which is a radio counterpart of SVS13. It is currently difficult to attribute the observed proper motions of the maser features to either the jet or the rotating circumstellar disk associated with VLA4A, which should be investigated through future high-resolution astrometric observations of VLA4A and other radio sources in NGC1333.

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Detection table from Hirota et al. (2008b)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Source name	Image	Descr.	Line	Telescope	V_step	Beam	PA	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)					H₂O		(km/s)	(arcsec)	(deg.)	Yes/No		(kpc)
1	+03 29 3.72465	+31 16 3.7015	158.3474	-20.5552	G158.347-20.556	NGC 1333 SVS 13	Image	Descr	22 GHz;	VERA	0.21	0.0012 x 0.0009	-40	+H₂O -CH₃OH I -CH₃OH II	SFR_MIXED	0.235 (0.018)	2004 Nov - 2005 May

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 'HIR08B' 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 'HIR08B' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

HIR08B - Astrometry of H2O Masers in Nearby Star-Forming Regions with VERA. II. SVS13 in NGC1333

View as list of objects

Detection table from Hirota et al. (2008b)

HIR08B - Astrometry of H₂O Masers in Nearby Star-Forming Regions with VERA. II. SVS13 in NGC1333