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DZI18 - A revised distance to IRAS 16293-2422 from VLBA astrometry of associated water masers

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Short title: Dzib et al. (2018)
Authors: Dzib, S. A.Ortiz-LeÃ³n, G. N.HernÃ¡ndez-GÃ³mez, A.Loinard, L.Mioduszewski, A. J.Claussen, M.Menten, K. M.Caux, E.Sanna, A.
Journal: Astronomy & Astrophysics, Volume 614, id.A20, 12 pp.
Bibcode:

Target type: High_mass_SFR

Abstract
IRAS 16293-2422 is a very well-studied young stellar system seen in projection towards the L1689N cloud in the Ophiuchus complex. However, its distance is still uncertain; there is a range of values from 120 pc to 180 pc. Our goal is to measure the trigonometric parallax of this young star by means of H2O maser emission. We use archival data from 15 epochs of VLBA observations of the 22.2 GHz water maser line. By modeling the displacement on the sky of the H2O maser spots, we derived a trigonometric parallax of 7.1 � 1.3 mas, corresponding to a distance of 141-21+30 pc. This new distance is in good agreement with recent values obtained for other magnetically active young stars in the L1689 cloud. We relate the kinematics of these masers with the outflows and the recent ejections powered by source A in the system.

Abstract

IRAS 16293-2422 is a very well-studied young stellar system seen in projection towards the L1689N cloud in the Ophiuchus complex. However, its distance is still uncertain; there is a range of values from 120 pc to 180 pc. Our goal is to measure the trigonometric parallax of this young star by means of H2O maser emission. We use archival data from 15 epochs of VLBA observations of the 22.2 GHz water maser line. By modeling the displacement on the sky of the H2O maser spots, we derived a trigonometric parallax of 7.1 � 1.3 mas, corresponding to a distance of 141-21+30 pc. This new distance is in good agreement with recent values obtained for other magnetically active young stars in the L1689 cloud. We relate the kinematics of these masers with the outflows and the recent ejections powered by source A in the system.

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Detection table from Dzib et al. (2018)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Maser spot	Source name	Image	Descr.	Line	V_peak	μ_X	μ_Y	π	Epoch	Telescope	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)							H₂O	(km/s)	(mas/yr)	(mas/yr)	(mas)	#		Yes/No		(kpc)
1	+16 32 22.8808	-24 28 36.487			353.9354987	15.8392047	G353.936+15.839			IRAS 16293-2422	Image	Descr	22 GHz;	6.8					VLBA	+H₂O -CH₃OH I -CH₃OH II	SFR	0.141 (-0.021 +0.030)	2005 Aug 2 - 2006 Apr 13
	+16 32 22.8013945	-24 28 36.48795	-1191.2 mas	-1.11 mas	353.935295	15.839433		1	Spot 1	IRAS 16293-2422					-44 (19)	-13 (6)	6.9 (4.7)	2453626.46
	+16 32 22.8012977	-24 28 36.48899	-1192.65 mas	-2.15 mas	353.935295	15.839433		2	Spot 1	IRAS 16293-2422								2453639.43
	+16 32 22.8012641	-24 28 36.48988	-1193.16 mas	-3.04 mas	353.935294	15.839433		3	Spot 1	IRAS 16293-2422								2453657.36
	+16 32 22.8012193	-24 28 36.49008	-1193.83 mas	-3.24 mas	353.935294	15.839433		4	Spot 1	IRAS 16293-2422								2453676.33
	+16 32 22.801336	-24 28 36.49466	-1192.08 mas	-7.82 mas	353.935293	15.839432		5	Spot 2	IRAS 16293-2422					-39 (2)	-16 (5)	7.1 (1.3)	2453754.12
	+16 32 22.8011462	-24 28 36.49585	-1194.93 mas	-9.01 mas	353.935293	15.839433		6	Spot 2	IRAS 16293-2422								2453797
	+16 32 22.8010585	-24 28 36.49685	-1196.24 mas	-10.01 mas	353.935292	15.839433		7	Spot 2	IRAS 16293-2422								2453811.96
	+16 32 22.8008828	-24 28 36.49764	-1198.88 mas	-10.8 mas	353.935292	15.839433		8	Spot 2	IRAS 16293-2422								2453824.92
	+16 32 22.8007241	-24 28 36.49905	-1201.26 mas	-12.21 mas	353.935291	15.839433		9	Spot 2	IRAS 16293-2422								2453838.88
	+16 32 22.8013353	-24 28 36.49693	-1192.09 mas	-10.09 mas	353.935293	15.839432		10	Spot 3	IRAS 16293-2422					-37 (3)	-21 (4)	8.3 (2.1)	2453771.07
	+16 32 22.8012091	-24 28 36.49824	-1193.98 mas	-11.4 mas	353.935292	15.839432		11	Spot 3	IRAS 16293-2422								2453797
	+16 32 22.801117	-24 28 36.49876	-1195.37 mas	-11.92 mas	353.935292	15.839432		12	Spot 3	IRAS 16293-2422								2453811.96
	+16 32 22.8009297	-24 28 36.50005	-1198.17 mas	-13.21 mas	353.935291	15.839433		13	Spot 3	IRAS 16293-2422								2453824.92
	+16 32 22.8007789	-24 28 36.50114	-1200.44 mas	-14.3 mas	353.935291	15.839433		14	Spot 3	IRAS 16293-2422								2453838.88

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 'DZI18' 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 'DZI18' AND detected=true AND hide=false ORDER BY detected DESC,id

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DZI18 - A revised distance to IRAS 16293-2422 from VLBA astrometry of associated water masers

Interferometry data

View as list of objects

Detection table from Dzib et al. (2018)