Misaligned Rotations of the Envelope, Outflow, and Disks in the Multiple Protostellar System of VLA 1623-2417: FAUST. III - INSU - Institut national des sciences de l'Univers
Article Dans Une Revue The Astrophysical Journal Année : 2022

Misaligned Rotations of the Envelope, Outflow, and Disks in the Multiple Protostellar System of VLA 1623-2417: FAUST. III

Satoshi Ohashi
Nami Sakai
Claire J. Chandler
  • Fonction : Auteur
Felipe Alves
Davide Fedele
  • Fonction : Auteur
Tomoyuki Hanawa
Aurora Durán
  • Fonction : Auteur
Laurent Loinard
Seyma Mercimek
  • Fonction : Auteur
Nadia M. Murillo
  • Fonction : Auteur
Linda Podio
  • Fonction : Auteur
Yichen Zhang
Yuri Aikawa
Nadia Balucani
Paola Caselli
Steven Charnley
  • Fonction : Auteur
Spandan Choudhury
  • Fonction : Auteur
Francois Dulieu
  • Fonction : Auteur
Lucy Evans
  • Fonction : Auteur
Siyi Feng
Francesco Fontani
Logan Francis
Tetsuya Hama
Eric Herbst
Shingo Hirano
  • Fonction : Auteur
Tomoya Hirota
Muneaki Imai
Andrea Isella
Izaskun Jímenez-Serra
Doug Johnstone
Luke T. Maud
  • Fonction : Auteur
Maria Jose Maureira
  • Fonction : Auteur
Anna Miotello
George Moellenbrock
Shoji Mori
Riouhei Nakatani
Hideko Nomura
Yasuhiro Oba
Ross O'Donoghue
  • Fonction : Auteur
Yuki Okoda
Yoko Oya
Jaime Pineda
Albert Rimola
Takeshi Sakai
Dominique Segura-Cox
Yancy Shirley
  • Fonction : Auteur
Brian Svoboda
Vianney Taquet
Leonardo Testi
Serena Viti
Naoki Watanabe
Yoshimasa Watanabe
Ci Xue
Bo Zhao
  • Fonction : Auteur
Satoshi Yamamoto
  • Fonction : Auteur

Résumé

We report a study of the low-mass Class 0 multiple system VLA 1623AB in the Ophiuchus star-forming region, using H13CO+ (J = 3-2), CS (J = 5-4), and CCH (N = 3-2) lines as part of the ALMA Large Program FAUST. The analysis of the velocity fields revealed the rotation motion in the envelope and the velocity gradients in the outflows (about 2000 au down to 50 au). We further investigated the rotation of the circumbinary VLA 1623A disk, as well as the VLA 1623B disk. We found that the minor axis of the circumbinary disk of VLA 1623A is misaligned by about 12° with respect to the large-scale outflow and the rotation axis of the envelope. In contrast, the minor axis of the circumbinary disk is parallel to the large-scale magnetic field according to previous dust polarization observations, suggesting that the misalignment may be caused by the different directions of the envelope rotation and the magnetic field. If the velocity gradient of the outflow is caused by rotation, the outflow has a constant angular momentum and the launching radius is estimated to be 5-16 au, although it cannot be ruled out that the velocity gradient is driven by entrainments of the two high-velocity outflows. Furthermore, we detected for the first time a velocity gradient associated with rotation toward the VLA 16293B disk. The velocity gradient is opposite to the one from the large-scale envelope, outflow, and circumbinary disk. The origin of its opposite gradient is also discussed.
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Dates et versions

insu-03672047 , version 1 (20-05-2022)

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Satoshi Ohashi, Claudio Codella, Nami Sakai, Claire J. Chandler, Cecilia Ceccarelli, et al.. Misaligned Rotations of the Envelope, Outflow, and Disks in the Multiple Protostellar System of VLA 1623-2417: FAUST. III. The Astrophysical Journal, 2022, 927, ⟨10.3847/1538-4357/ac4cae⟩. ⟨insu-03672047⟩
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