Molecules with ALMA at Planet-forming Scales (MAPS). XVI. Characterizing the Impact of the Molecular Wind on the Evolution of the HD 163296 System - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Supplement Series Year : 2021

Molecules with ALMA at Planet-forming Scales (MAPS). XVI. Characterizing the Impact of the Molecular Wind on the Evolution of the HD 163296 System

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Alice S. Booth
  • Function : Author
Benoît Tabone
  • Function : Author
John D. Ilee
  • Function : Author
Catherine Walsh
  • Function : Author
Yuri Aikawa
Sean M. Andrews
  • Function : Author
Jaehan Bae
Edwin A. Bergin
  • Function : Author
Jennifer B. Bergner
  • Function : Author
Arthur D. Bosman
  • Function : Author
Jenny K. Calahan
  • Function : Author
Gianni Cataldi
  • Function : Author
L. Ilsedore Cleeves
  • Function : Author
Ian Czekala
  • Function : Author
Viviana V. Guzmán
  • Function : Author
Jane Huang
  • Function : Author
Charles J. Law
  • Function : Author
Feng Long
  • Function : Author
Ryan A. Loomis
  • Function : Author
Hideko Nomura
Karin I. Öberg
  • Function : Author
Chunhua Qi
Kamber R. Schwarz
  • Function : Author
Richard Teague
Takashi Tsukagoshi
David J. Wilner
  • Function : Author
Yoshihide Yamato
  • Function : Author
Ke Zhang
  • Function : Author

Abstract

During the main phase of evolution of a protoplanetary disk, accretion regulates the inner-disk properties, such as the temperature and mass distribution, and in turn, the physical conditions associated with planet formation. The driving mechanism behind accretion remains uncertain; however, one promising mechanism is the removal of a fraction of angular momentum via a magnetohydrodynamic (MHD) disk wind launched from the inner tens of astronomical units of the disk. This paper utilizes CO isotopologue emission to study the unique molecular outflow originating from the HD 163296 protoplanetary disk obtained with the Atacama Large Millimeter/submillimeter Array. HD 163296 is one of the most well-studied Class II disks and is proposed to host multiple gas-giant planets. We robustly detect the large-scale rotating outflow in the 12CO J = 2 - 1 and the 13CO J = 2 - 1 and J = 1 - 0 transitions. We constrain the kinematics, the excitation temperature of the molecular gas, and the mass-loss rate. The high ratio of the rates of ejection to accretion (5-50), together with the rotation signatures of the flow, provides solid evidence for an MHD disk wind. We find that the angular momentum removal by the wind is sufficient to drive accretion though the inner region of the disk; therefore, accretion driven by turbulent viscosity is not required to explain HD 163296's accretion. The low temperature of the molecular wind and its overall kinematics suggest that the MHD disk wind could be perturbed and shocked by the previously observed high-velocity atomic jet. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.

Dates and versions

insu-03672365 , version 1 (19-05-2022)

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Cite

Alice S. Booth, Benoît Tabone, John D. Ilee, Catherine Walsh, Yuri Aikawa, et al.. Molecules with ALMA at Planet-forming Scales (MAPS). XVI. Characterizing the Impact of the Molecular Wind on the Evolution of the HD 163296 System. The Astrophysical Journal Supplement Series, 2021, 257, ⟨10.3847/1538-4365/ac1ad4⟩. ⟨insu-03672365⟩
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