A triple star in disarray -- Multi-epoch observations of T Tauri with VLT-SPHERE and LBT-LUCI
arXiv:2011.06345 · doi:10.1051/0004-6361/202039186
Abstract
T Tauri remains an enigmatic triple star for which neither the evolutionary state of the stars themselves, nor the geometry of the complex outflow system is completely understood. Eight-meter class telescopes equipped with state-of-the-art adaptive optics provide the spatial resolution necessary to trace tangential motion of features over a timescale of a few years, and they help to associate them with the different outflows. We used J-, H-, and K-band high-contrast coronagraphic imaging with VLT-SPHERE recorded between 2016 and 2018 to map reflection nebulosities and obtain high precision near-infrared (NIR) photometry of the triple star. We also present molecular hydrogen emission maps of the 1-0 S(1) line at 2.122 micron obtained with LBT-LUCI during its commissioning period at the end of 2016. The data reveal a number of new features in the system, some of which are seen in reflected light and some are seen in H2 emission; furthermore, they can all be associated with the main outflows. The tangential motion of the features provides compelling evidence that T Tauri Sb drives the southeast-northwest outflow. T Tauri Sb has recently faded probably because of increased extinction as it passes through the southern circumbinary disk. While T Tauri Sb is approaching periastron, T Tauri Sa instead has brightened and is detected in all our J-band imagery for the first time.
arXiv comment10 pages, 9 figures, accepted for publication in A&A
References in corpus (27)
- Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
- SPHERE: the exoplanet imager for the Very Large Telescope
- PynPoint: An Image Processing Package for Finding Exoplanets
- Photometric characterization of exoplanets using angular and spectral differential imaging
- Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy
- VLBA determination of the distance to nearby star-forming regions I. The distance to T Tauri with 0.4% accuracy
- The Structure of High Strehl Ratio Point-Spread Functions
- Observational constraints on dust disk sizes in tidally truncated protoplanetary disks in multiple systems in the Taurus region
- A Third Star in the T Tauri System
- Evidence for J and H-band excess in classical T Tauri stars and the implications for disk structure and estimated ages
- Gas flow and accretion via spiral streamers and circumstellar disks in a young binary protostar
- Spatially resolved mid-infrared observations of the triple system T Tauri
- Gap, shadows, spirals, streamers: SPHERE observations of binary-disk interactions in GG Tau A
- A circumstellar dust disk around T Tau N: Sub-arcsecond imaging at 3 mm
- Mapping the Circumstellar Environment of T Tauri with Fluorescent H_2 Emission
- Orbital Motion in Pre-Main Sequence Binaries
- The circumstellar environment of T Tau S at high spatial and spectral resolution
- The Spatial Distribution of Fluorescent H Near T Tau
- A High Spatial Resolution Infrared View of the T Tauri Multiple System
- Variable accretion as a mechanism for brightness variations in T Tau S
- Orbits in the T Tauri triple system observed with SPHERE
- Spatially resolved imaging spectroscopy of T Tauri
- Is T Tauri North a 'Classical' T Tauri star?
- New Circumstellar Structure in the T Tauri System
- Orbital Motion, Variability, and Masses in the T Tauri Triple System
- High-contrast Polarimetry Observation of T Tau Circumstellar Environment
- On the Nature of the T Tauri Triple System