2018A&A...614A..20D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.02CEST14:29:09

2018A&A...614A..20D - Astronomy and Astrophysics, volume 614A, 20-20 (2018/6-1)

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

DZIB S.A., ORTIZ-LEON G.N., HERNANDEZ-GOMEZ A., LOINARD L., MIODUSZEWSKI A.J., CLAUSSEN M., MENTEN K.M., CAUX E. and SANNA A.

Abstract (from CDS):

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 Copyright: © ESO 2018

Journal keyword(s): astrometry - masers - stars: formation - stars: individual: IRAS 1629-2422 - techniques: interferometric

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B1622-253 QSO 16 25 46.89164010 -25 27 38.3267989   21.3 20.6 19.60   ~ 301 1
2 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 185 0
3 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3026 0
4 LDN 1689 DNe 16 32 22.5 -24 28 29           ~ 109 0
5 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1
6 [W89] A2 Rad 16 32 22.866 -24 28 35.90           ~ 21 0
7 [W89] A1 Rad 16 32 22.887 -24 28 35.67           ~ 22 0
8 LDN 1689N DNe 16 32 31 -24 28.6           ~ 108 0
9 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1550 2

    Equat.    Gal    SGal    Ecl

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2020.07.02-14:29:09

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