Star-Crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination
arXiv:2303.11347 · doi:10.3847/1538-4357/acc58b
Abstract
The stellar companion to the weak-line T Tauri star DI Tau A was first discovered by the lunar occultation technique in 1989 and was subsequently confirmed by a speckle imaging observation in 1991. It has not been detected since, despite being targeted by five different studies that used a variety of methods and spanned more than 20 years. Here, we report the serendipitous rediscovery of DI Tau B during our Young Exoplanets Spectroscopic Survey (YESS). Using radial velocity data from YESS spanning 17 years, new adaptive optics observations from Keck II, and a variety of other data from the literature, we derive a preliminary orbital solution for the system that effectively explains the detection and (almost all of the) non-detection history of DI Tau B. We estimate the dynamical masses of both components, finding that the large mass difference (q 0.17) and long orbital period (35 years) make DI Tau system a noteworthy and valuable addition to studies of stellar evolution and pre-main-sequence models. With a long orbital period and a small flux ratio (f2/f1) between DI Tau A and B, additional measurements are needed for a better comparison between these observational results and pre-main-sequence models. Finally, we report an average surface magnetic field strength () for DI Tau A, of 0.55 kG, which is unusually low in the context of young active stars.
arXiv comment21 pages, 10 figures. Accepted to ApJ
References in corpus (58)
- Array Programming with NumPy
- Astropy: A Community Python Package for Astronomy
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
- The Zwicky Transient Facility: System Overview, Performance, and First Results
- A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
- Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
- New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
- Gaia Early Data Release 3: The astrometric solution
- Gaia Early Data Release 3: Photometric content and validation
- From Molecular Cores to Planet-forming Disks: A SIRTF Legacy Program
- An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
- The NextGen Model Atmosphere grid: II. Spherically symmetric model atmospheres for giant stars with effective temperatures between 3000 and 6800~K
- Stellar magnetism: empirical trends with age and rotation
- Model Atmospheres for M (Sub)Dwarfs: I. The base model grid
- The Magnetic Fields of Classical T Tauri Stars
- Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. III. A Consistent 10 Myr Age for the Upper Scorpius OB Association
- An Assessment of Dynamical Mass Constraints on Pre-Main Sequence Evolutionary Tracks
- Mapping the Shores of the Brown Dwarf Desert II: Multiple Star Formation in Taurus-Auriga
- IRAC Observations of Taurus Pre-Main Sequence Stars
- Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
- Results of the ROTOR-program. I. The long-term photometric variability of classical T Tauri stars
- Close Companions to Young Stars. I. A Large Spectroscopic Survey in Chamaeleon I and Taurus-Auriga
- Correcting for Telluric Absorption: Methods, Case Studies, and Release of the TelFit Code
- VLBA determination of the distance to nearby star-forming regions III. HP Tau/G2 and the three-dimensional structure of Taurus
- Results of the ROTOR-program. II. The long-term photometric variability of weak-line T Tauri stars
- A Candidate Young Massive Planet in Orbit around the Classical T Tauri Star CI Tau
- The IAG solar flux atlas: Accurate wavelengths and absolute convective blueshift in standard solar spectra
- Masses and Implications for Ages of Low-Mass Pre-Main Sequence Stars in Taurus and Ophiuchus
- Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
- The Smallest Mass Ratio Young Star Spectroscopic Binaries
- TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux
- A Young Planet Search in Visible and IR Light: DN Tau, V836 Tau, and V827 Tau
- A Search for Giant Planet Companions to T Tauri Stars
- Magnetic-field measurements of T Tauri stars in the Orion Nebula cluster
- Characterizing TW Hydra
- Starspot-induced optical and infrared radial velocity variability in T Tauri star Hubble 4
- Testing the Reality of Strong Magnetic Fields on T Tauri Stars: The Naked T Tauri Star Hubble 4
- Measuring the Magnetic Field on the Classical T Tauri Star TW Hydrae
- Orbital Motion in Pre-Main Sequence Binaries
- Dynamical Masses of Young Stars I: Discordant Model Ages of Upper Scorpius
- 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
- Dynamical Mass Estimates for Incomplete Orbits: Young Multiple Stars in Taurus and Ophiuchus
- The IGRINS YSO Survey I. Stellar parameters of pre-main sequence stars in Taurus-Auriga
- The Effects of Starspots on Spectroscopic Mass Estimates of Low-mass Young Stars
- Measuring the magnetic field of young stars using iSHELL observations: BP Tau and V347 Aur
- Orbit and Stellar Properties of the Young Triple V807 Tau
- The HD 98800 quadruple pre-main sequence system. Towards full orbital characterisation using long-baseline infrared interferometry
- The Mean Magnetic Field Strength of CI Tau
- A coplanar circumbinary protoplanetary disk in the TWA 3 triple M dwarf system
- Confirmation of Water Absorption in the Thermal Emission Spectrum of the Hot Jupiter WASP-77Ab with HST/WFC3
- Modification of the MOOG spectral synthesis codes to account for Zeeman broadening of spectral lines
- Dynamical Masses of Young Stars II: Young Taurus Binaries Hubble~4, FF~Tau, and HP~Tau/G3
- Orbital Motion, Variability, and Masses in the T Tauri Triple System
- Dynamical masses for two M1 + mid-M dwarf binaries monitored during the SPHERE-SHINE survey
- Optical and Near-Infrared Excesses are Correlated in T Tauri Stars
- IGRINS RV: A Precision RV Pipeline for IGRINS Using Modified Forward Modeling in the Near-Infrared