Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Late Infall Causing Disk Misalignment and Dynamic Structures in SU Aur - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Letters Year : 2021

Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Late Infall Causing Disk Misalignment and Dynamic Structures in SU Aur

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Christian Ginski
  • Function : Author
Stefano Facchini
  • Function : Author
Jane Huang
  • Function : Author
Dennis Vaendel
  • Function : Author
Lucas Stapper
  • Function : Author
Carsten Dominik
  • Function : Author
Jaehan Bae
  • Function : Author
Gabriela Muro-Arena
  • Function : Author
Michiel R. Hogerheijde
  • Function : Author
Melissa Mcclure
  • Function : Author
Rob G. van Holstein
  • Function : Author
Tilman Birnstiel
  • Function : Author
Alexander Bohn
  • Function : Author
Mario Flock
  • Function : Author
Eric E. Mamajek
  • Function : Author
Carlo F. Manara
  • Function : Author
Paola Pinilla
  • Function : Author
Christophe Pinte
  • Function : Author
Álvaro Ribas
  • Function : Author

Abstract

Gas-rich circumstellar disks are the cradles of planet formation. As such, their evolution will strongly influence the resulting planet population. In the ESO DESTINYS large program, we study these disks within the first 10 Myr of their development with near-infrared scattered-light imaging. Here we present VLT/SPHERE polarimetric observations of the nearby class II system SU Aur in which we resolve the disk down to scales of ∼7 au. In addition to the new SPHERE observations, we utilize VLT/NACO, HST/STIS, and ALMA archival data. The new SPHERE data show the disk around SU Aur and extended dust structures in unprecedented detail. We resolve several dust tails connected to the Keplerian disk. By comparison with ALMA data, we show that these dust tails represent material falling onto the disk. The disk itself shows an intricate spiral structure and a shadow lane, cast by an inner, misaligned disk component. Our observations suggest that SU Aur is undergoing late infall of material, which can explain the observed disk structures. SU Aur is the clearest observational example of this mechanism at work and demonstrates that late accretion events can still occur in the class II phase, thereby significantly affecting the evolution of circumstellar disks. Constraining the frequency of such events with additional observations will help determine whether this process is responsible for the spin-orbit misalignment in evolved exoplanet systems. * Based on observations performed with VLT/SPHERE under program ID 1104.C-0415(E).

Dates and versions

insu-03705325 , version 1 (27-06-2022)

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Cite

Christian Ginski, Stefano Facchini, Jane Huang, Myriam Benisty, Dennis Vaendel, et al.. Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Late Infall Causing Disk Misalignment and Dynamic Structures in SU Aur. The Astrophysical Journal Letters, 2021, 908, ⟨10.3847/2041-8213/abdf57⟩. ⟨insu-03705325⟩
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