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

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 with 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 H${}_2$O 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 H${}_2$O maser spots, we derived a trigonometric parallax of $7.1\pm 1.3$ 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.

arXiv comment14 pages, 6 tables, 8 figures. Accepted to be published in Astronomy \& Astrophysics

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• The First VERA Astrometry Catalog
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• The Bridge: a transient phenomenon of forming stellar multiples
• Orbital and mass constraints of the young binary system IRAS 16293-2422 A
• The ALMA-PILS survey: First detection of nitrous acid (HONO) in the interstellar medium
• Dust Polarization Toward Embedded Protostars in Ophiuchus with ALMA. II. IRAS 16293-2422
• The ALMA-PILS survey: The first detection of doubly-deuterated methyl formate (CHD2OCHO) in the ISM
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• The ALMA-PILS survey: first detection of methyl isocyanide (CH${}_3$NC) in a solar-type protostar
• The ALMA-PILS survey: Gas dynamics in IRAS 16293$-$2422 and the connection between its two protostars
• The prebiotic molecular inventory of Serpens SMM1 I. An investigation of the isomers CH${}_3$NCO and HOCH${}_2$CN
• Temperature profiles of young disk-like structures: The case of IRAS 16293A
• The young protostellar disk in IRAS16293-2422 B is hot and shows signatures of gravitational instability
• Linking interstellar and cometary O${}_2$: a deep search for ${}^{16}$O${}^{18}$O in the solar-type protostar IRAS 16293--2422
• Methyl cyanide (CH3CN) and propyne (CH3CCH) in the low mass protostar IRAS 16293-2422
• Successive deuteration in low-mass star-forming regions: the case of D${}_2$-methanol (CHD${}_2$OH) in IRAS 16293-2422
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• The ALMA-PILS survey: propyne (CH${}_3$CCH) in IRAS 16293$-$2422
• On the nature of the compact sources in IRAS 16293-2422 seen in at centimeter to sub-millimeter wavelengths
• Modelling the abundance structure of isocyanic acid (HNCO) toward the low-mass solar type protostar IRAS 16293-2422
• Exploring the Origins of Earth's Nitrogen: Astronomical Observations of Nitrogen-bearing Organics in Protostellar Environments
• Implementation of Rare Isotopologues into Machine Learning of the Chemical Inventory of the Solar-Type Protostellar Source IRAS 16293-2422
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• Hubble distancing: Focusing on distance measurements in cosmology
• Deuterated methyl mercaptan (CH${}_3$SD): Laboratory rotational spectroscopy and search toward IRAS 16293-2422 B
• The molecular environment of the solar-type protostar IRAS 16293-2422
• ALMA ACA study of the H${}_2$S/OCS ratio in low-mass protostars
• Deuterium fractionation of nitrogen hydrides: detections of NHD and ND${}_2$
• Hunting pre-stellar cores with APEX: IRAS16293E (Oph464)
• First map of D${}_2$H${}^{+}$ emission revealing the true centre of a prestellar core: further insights into deuterium chemistry
• Annual parallax measurements of a semiregular variable star SV Pegasus with VERA
• Nascent chemical complexity in prestellar core IRAS 16293E: complex organics and deuterated methanol
• Discovery of 22 GHz Water Masers in the Serpens South Region
• FAUST. XXVIII. High-Resolution ALMA Observations of Class 0/I Disks: Structure, Optical Depths, and Temperatures
• Powerful flare phenomena in water vapor maser lines in the emerging protostellar system with protoplanetary disks IRAS 16293-2422
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• First detection of the $J_{-1}\to (J-$ 1)${}_0-E$ methanol maser transitions at $J=7$ and $10$
• Rotating Motion of the Outflow of IRAS 16293-2422 A1 at its Origin Point near the Protostar
• Survey of (sub)mm water masers in low-mass star-forming regions