VLBA determination of the distance to nearby star-forming regions V. Dynamical mass, distance and radio structure of V773 Tau A

Abstract

(ABRIDGED) We present multi-epoch Very Long Baseline Array (VLBA) observations of V773 Tau A, the 51-day binary subsystem in the multiple young stellar system V773 Tau. Combined with previous interferometric and radial velocity measurements, these new data enable us to improve the characterization of the physical orbit of the A subsystem. In particular, we infer updated dynamical masses for the primary and the secondary components of 1.55 pm 0.11 Msun, and 1.293 pm 0.068 Msun, respectively, and an updated orbital parallax distance to the system of 135.7 pm 3.2 pc, all consistent with previous estimates. Using the improved orbit, we can calculate the absolute coordinates of the barycenter of V773 Tau A at each epoch of our VLBA observations, and fit for its trigonometric parallax and proper motion. This provides a direct measurement of the distance to the system almost entirely independent of the orbit modeling. The best fit yields a distance of 129.9 pm 3.2 pc, in good agreement (i.e. within 1 sigma) with the distance estimate based on the orbital fit. Taking the mean value of the orbital and trigonometric parallaxes, we conclude that V773 Tau is located at d =132.8 pm 2.3 pc. The accuracy of this determination is nearly one order of magnitude better than that of previous estimates. In projection, V773 Tau and two other young stars (Hubble 4 and HDE 283572) recently observed with the VLBA are located toward the dark cloud Lynds 1495, in the central region of Taurus. These three stars appear to have similar trigonometric parallaxes, radial velocities, and proper motions, and we argue that the weighted mean and dispersion of their distances (d = 131.4 pc and sigma_d = 2.4 pc) provide a good estimate of the distance to and depth of Lynds 1495 and its associated stellar population.

Accepted for publication in The Astrophysical Journal

References in corpus (5)

• VLBA determination of the distance to nearby star-forming regions I. The distance to T Tauri with 0.4% accuracy
• Synchrotron emission from the T Tauri binary system V773 Tau A
• Interacting coronae of two T Tauri stars: first observational evidence for solar-like helmet streamers
• Dynamical Masses for Pre-Main Sequence Stars: A Preliminary Physical Orbit for V773 Tau A
• A Surprising Dynamical Mass for V773~Tau~B

Cited by in corpus (69)

• The Mass Dependence Between Protoplanetary Disks and their Stellar Hosts
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• Micro-Arcsecond Radio Astrometry
• The Gould's Belt Distances Survey (GOBELINS) I. Trigonometric parallax distances and depth of the Ophiuchus complex
• Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry
• Placing the spotted T Tauri star LkCa 4 on an HR diagram
• The Stellar Membership of the Taurus Star-forming Region
• The Gould's Belt Distances Survey (GOBELINS). IV. Distance, Depth and Kinematics of the Taurus Star-Forming Region
• A Survey for New Members of the Taurus Star-Forming Region with the Sloan Digital Sky Survey
• Modelling the magnetic activity & filtering radial velocity curves of young Suns: the weak-line T Tauri star LkCa 4
• The variability timescales and brightness temperatures of radio flares from stars to supermassive black holes
• The Milky Way Spiral Structure Parameters from Data on Masers and Selected Open Clusters
• Magnetic activity and hot Jupiters of young Suns: the weak-line T Tauri stars V819 Tau and V830 Tau
• The Gaia reference frame for bright sources examined using VLBI observations of radio stars
• The SEEDS High Contrast Imaging Survey of Exoplanets around Young Stellar Objects
• The Dynamics of Interstellar Asteroids and Comets within the Galaxy: an Assessment of Local Candidate Source Regions for 1I/`Oumuamua and 2I/Borisov
• Dynamical Masses of Low Mass Stars in the Taurus and Ophiuchus Star Forming Regions
• Galactic masers: kinematics, spiral structure and the disk dynamic state
• The Gould Belt Very Large Array Survey IV: The Taurus-Auriga complex
• ALMA Measurements of Circumstellar Material in the GQ Lup System
• A 3D view of the Taurus star-forming region by Gaia and Herschel: multiple populations related to the filamentary molecular cloud
• Sub-stellar Companions and Stellar Multiplicity in the Taurus Star-Forming Region
• A kinematic study and membership analysis of the Lupus star-forming region
• A Survey For Planetary-mass Brown Dwarfs in the Taurus and Perseus Star-forming Regions
• Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry
• Accretion discs as regulators of stellar angular momentum evolution in the ONC and Taurus-Auriga
• Investigating the early evolution of planetary systems with ALMA and the Next Generation Very Large Array
• Kinematics of dense gas in the L1495 filament
• Observations and modelling of CO and [CI] in disks. First detections of [CI] and constraints on the carbon abundance
• B- and A-Type Stars in the Taurus-Auriga Star Forming Region
• Internal and relative motions of the Taurus and Ophiuchus star-forming regions
• Orbit and Stellar Properties of the Young Triple V807 Tau
• s-Processing from MHD-induced mixing and isotopic abundances in presolar SiC grains
• The properties of Planck Galactic cold clumps in the L1495 dark cloud
• The quadruple pre-main sequence system LkCa3: Implications for stellar evolution models
• Star-disk interactions in multi-band photometric monitoring of the classical T Tauri star GI Tau
• VLBA determination of the distance to nearby star-forming regions VII. Monoceros R2
• The eclipse of the V773 Tau B circumbinary disk
• Orbital Motion of Young Binaries in Ophiuchus and Upper Centaurus-Lupus
• The Gould Belt, the de Vaucouleurs-Dolidze Belt, and the Orion Arm
• Variable Radio Emission from the Young Stellar Host of a Hot Jupiter
• T Tauri Stars: Physical Parameters and Evolutionary Status
• Detection of periodic variations in vertical velocities of Galactic masers
• The Magnetic Field of L1544: I. Near-Infrared Polarimetry and the Non-Uniform Envelope
• JVLA Observations of Young Brown Dwarfs
• A Surprising Dynamical Mass for V773~Tau~B
• The compact, time-variable radio source projected inside W3(OH): Evidence for a Photoevaporated Disk?
• Non-thermal radio continuum emission from young nearby stars
• Multi-epoch, high spatial resolution observations of multiple T Tauri systems
• VLA observations of the disk around the young brown dwarf 2MASS J044427+2512
• The JCMT Transient Survey: Single Epoch Transients and Variability of Faint Sources
• The milliarcsecond-scale radio structure of AB Dor A
• GMRT detections of low mass young stars at 323 and 608 MHz
• Dynamical timescale of precollapse evolution inferred from chemical distribution in the Taurus Molecular Cloud-1 (TMC-1) filament
• Optical and Near-Infrared Excesses are Correlated in T Tauri Stars
• The Gould's Belt Distances Survey
• Analysis of Galactic Rotation from Masers based on a Nonlinear Oort Model
• Using binary statistics in Taurus-Auriga to distinguish between brown dwarf formation processes
• Radio monitoring of the periodically variable IR source LRLL 54361: No direct correlation between the radio and IR emissions
• Parameters of the Link between the Optical and Radio Frames from Gaia DR2 Data and VLBI Measurements
• Orbital parallax of binary systems compared to GAIA DR3 and the parallax zero-point offset at bright magnitudes
• The System of Molecular Clouds in the Gould Belt
• Radio detection of the young binary HD 160934
• Residual HCRF Rotation relative to the Inertial Coordinate System
• Probing Signatures of a Distant Planet around the Young T-Tauri Star CI Tau Hosting a Possible Hot Jupiter
• Validating the bright Gaia celestial reference frame with new VLBI astrometry of radio stars
• The Multiple Young Stellar Objects of HBC 515: An X-ray and Millimeter-wave Imaging Study in (Pre-main Sequence) Diversity
• Radio emission from flaring stars and brown dwarfs