High-Resolution Near-Infrared Polarimetry and Sub-Millimeter Imaging of FS Tau A: Possible Streamers in Misaligned Circumbinary Disk System

Abstract

We analyzed the young (2.8-Myr-old) binary system FS Tau A using near-infrared (H-band) high-contrast polarimetry data from Subaru/HiCIAO and sub-millimeter CO (J=2-1) line emission data from ALMA. Both the near-infrared and sub-millimeter observations reveal several clear structures extending to $\sim$240 AU from the stars. Based on these observations at different wavelengths, we report the following discoveries. One arm-like structure detected in the near-infrared band initially extends from the south of the binary with a subsequent turn to the northeast, corresponding to two bar-like structures detected in ALMA observations with an LSRK velocity of 1.19-5.64 km/s. Another feature detected in the near-infrared band extends initially from the north of the binary, relating to an arm-like structure detected in ALMA observations with an LSRK velocity of 8.17-16.43 km/s. From their shapes and velocities, we suggest that these structures can mostly be explained by two streamers that connect the outer circumbinary disk and the central binary components. These discoveries will be helpful for understanding the evolution of streamers and circumstellar disks in young binary systems.

arXiv comment20 pages, 11 figures, accepted for publication in The Astrophysical Journal

References in corpus (32)

• Nonlinear Outcome of Gravitational Instability in Cooling, Gaseous Disks
• Kepler-16: A Transiting Circumbinary Planet
• Gravitational Instabilities in Circumstellar Disks
• Observational Constraints on the Formation and Evolution of Binary Stars
• Binary Black Hole Accretion From a Circumbinary Disk: Gas Dynamics Inside the Central Cavity
• A Planetary Companion to gamma Cephei A
• The burst mode of accretion and disk fragmentation in the early embedded stages of star formation
• The Origin of Episodic Accretion Bursts in the Early Stages of Star Formation
• Three Dimensional MHD Simulation of Circumbinary Accretion Disks: Disk Structures and Angular Momentum Transport
• A Triple Protostar System Formed via Fragmentation of a Gravitationally Unstable Disk
• Structures in the protoplanetary disk of HD142527 seen in polarized scattered light
• Tearing up the disc: misaligned accretion on to a binary
• The Coevality of Young Binary Systems
• Close Companions to Young Stars. I. A Large Spectroscopic Survey in Chamaeleon I and Taurus-Auriga
• Tidal Truncation of Inclined Circumstellar and Circumbinary Discs in Young Stellar Binaries
• Properties of gravitoturbulent accretion disks
• Direct Imaging and Spectroscopy of a Candidate Companion Below/Near the Deuterium-Burning Limit In The Young Binary Star System, ROXs 42B
• Signatures of broken protoplanetary discs in scattered light and in sub-millimetre observations
• Resolved young binary systems and their disks
• Star Formation in Space and Time: Taurus-Auriga
• Pulsed Accretion onto Eccentric and Circular Binaries
• Polar alignment of a protoplanetary disk around an eccentric binary
• Spiral Arms in Gravitationally Unstable Protoplanetary Disks as Imaged in Scattered Light
• An M Dwarf Companion and Its Induced Spiral Arms in the HD 100453 Protoplanetary Disk
• New prospects for observing and cataloguing exoplanets in well detached binaries
• Signatures of Gravitational Instability in Resolved Images of Protostellar Disks
• Reduction of polarimetric data using Mueller calculus applied to Nasmyth instruments
• Dynamics of Circumstellar Disks III: The case of GG Tau A
• High-Resolution Optical and Near-Infrared Images of the FS Tauri Circumbinary Disk
• Near-Infrared Imaging Polarimetry of Inner Region of GG Tau A Disk
• Is FS Tau B Driving an Asymmetric Jet?
• A Resolved Near-Infrared Image of The Inner Cavity in The GM Aur Transitional Disk

Cited by in corpus (4)

• Large-scale CO spiral arms and complex kinematics associated with the T Tauri star RU Lup
• Binary-induced spiral arms inside the disc cavity of AB Aurigae
• OGLE-2019-BLG-1470LABc: Another Microlensing Giant Planet in a Binary System?
• Planet-forming disks and their environment across regions and time from the full NIR census