Large-scale CO Spiral Arms and Complex Kinematics Associated with the T Tauri Star RU Lup - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Year : 2020

Large-scale CO Spiral Arms and Complex Kinematics Associated with the T Tauri Star RU Lup

, , , , (1) , , , , , , ,
1
Jane Huang
  • Function : Author
Sean M. Andrews
  • Function : Author
Karin I. Öberg
  • Function : Author
Megan Ansdell
  • Function : Author
John M. Carpenter
  • Function : Author
Andrea Isella
  • Function : Author
Laura M. Pérez
  • Function : Author
Luca Ricci
  • Function : Author
Jonathan P. Williams
  • Function : Author
David J. Wilner
  • Function : Author
Zhaohuan Zhu
  • Function : Author

Abstract

While protoplanetary disks often appear to be compact and well organized in millimeter continuum emission, CO spectral line observations are increasingly revealing complex behavior at large distances from the host star. We present deep Atacama Large Millimeter/submillimeter Array maps of the J = 2-1 transition of 12CO, 13CO, and C18O, as well as the J = 3-2 transition of DCO+, toward the T Tauri star RU Lup at a resolution of ∼0.3″ (∼50 au). The CO isotopologue emission traces four major components of the RU Lup system: a compact Keplerian disk with a radius of ∼120 au, a non-Keplerian "envelope-like" structure surrounding the disk and extending to ∼260 au from the star, at least five blueshifted spiral arms stretching up to 1000 au, and clumps outside the spiral arms located up to 1500 au in projection from RU Lup. We comment on potential explanations for RU Lup's peculiar gas morphology, including gravitational instability, accretion of material onto the disk, or perturbation by another star. RU Lup's extended non-Keplerian CO emission, elevated stellar accretion rate, and unusual photometric variability suggest that it could be a scaled-down Class II analog of the outbursting FU Ori systems.

Dates and versions

insu-03705188 , version 1 (27-06-2022)

Identifiers

Cite

Jane Huang, Sean M. Andrews, Karin I. Öberg, Megan Ansdell, Myriam Benisty, et al.. Large-scale CO Spiral Arms and Complex Kinematics Associated with the T Tauri Star RU Lup. The Astrophysical Journal, 2020, 898, ⟨10.3847/1538-4357/aba1e1⟩. ⟨insu-03705188⟩
1 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More