FAUST XII. Accretion streamers and jets in the VLA 1623–2417 protocluster

DOI PDF PDF 被引用文献3件 参考文献60件
  • C Codella
    INAF, Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125 Firenze , Italy
  • L Podio
    INAF, Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125 Firenze , Italy
  • M De Simone
    INAF, Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125 Firenze , Italy
  • C Ceccarelli
    Univ. Grenoble Alpes, CNRS, IPAG , F-38000 Grenoble , France
  • S Ohashi
    RIKEN Cluster for Pioneering Research , 2-1, Hirosawa, Wako-shi, Saitama 351-0198 , Japan
  • C J Chandler
    National Radio Astronomy Observatory , PO Box O, Socorro, NM 87801 , USA
  • N Sakai
    RIKEN Cluster for Pioneering Research , 2-1, Hirosawa, Wako-shi, Saitama 351-0198 , Japan
  • J E Pineda
    Max-Planck-Institut für extraterrestrische Physik (MPE) , Gießenbachstr. 1, D-85741 Garching , Germany
  • D M Segura-Cox
    Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712 , USA
  • E Bianchi
    Excellence Cluster ORIGINS , Boltzmannstraße 2, D-85748 Garching bei München , Germany
  • N Cuello
    Univ. Grenoble Alpes, CNRS, IPAG , F-38000 Grenoble , France
  • A López-Sepulcre
    Univ. Grenoble Alpes, CNRS, IPAG , F-38000 Grenoble , France
  • D Fedele
    INAF, Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125 Firenze , Italy
  • P Caselli
    Max-Planck-Institut für extraterrestrische Physik (MPE) , Gießenbachstr. 1, D-85741 Garching , Germany
  • S Charnley
    Astrochemistry Laboratory , Code 691, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771 , USA
  • D Johnstone
    Department of Physics and Astronomy, University of Victoria , 3800 Finnerty Road, Elliot Building Victoria, BC V8P 5C2 , Canada
  • Z E Zhang
    RIKEN Cluster for Pioneering Research , 2-1, Hirosawa, Wako-shi, Saitama 351-0198 , Japan
  • M J Maureira
    Max-Planck-Institut für extraterrestrische Physik (MPE) , Gießenbachstr. 1, D-85741 Garching , Germany
  • Y Zhang
    RIKEN Cluster for Pioneering Research , 2-1, Hirosawa, Wako-shi, Saitama 351-0198 , Japan
  • G Sabatini
    INAF, Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125 Firenze , Italy
  • B Svoboda
    National Radio Astronomy Observatory , PO Box O, Socorro, NM 87801 , USA
  • I Jiménez-Serra
    Centro de Astrobiologia (CSIC-INTA) , Ctra. de Torrejon a Ajalvir, km 4, E-28850 Torrejon de Ardoz , Spain
  • L Loinard
    Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México , A.P. 3-72 (Xangari), 8701 Morelia , Mexico
  • S Mercimek
    INAF, Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125 Firenze , Italy
  • N Murillo
    RIKEN Cluster for Pioneering Research , 2-1, Hirosawa, Wako-shi, Saitama 351-0198 , Japan
  • S Yamamoto
    The Graduate University for Advanced Studies (SOKENDAI) , Shonan-village, Hayama, Kanagawa 240-0193 , Japan

書誌事項

公開日
2024-02-14
資源種別
journal article
権利情報
  • https://creativecommons.org/licenses/by/4.0/
DOI
  • 10.1093/mnras/stae472
公開者
Oxford University Press (OUP)

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説明

<jats:title>ABSTRACT</jats:title> <jats:p>The ALMA interferometer has played a key role in revealing a new component of the Sun-like star forming process: the molecular streamers, i.e. structures up to thousands of au long funnelling material non-axisymmetrically to discs. In the context of the FAUST ALMA LP, the archetypical VLA1623-2417 protostellar cluster has been imaged at 1.3 mm in the SO(56–45), SO(66–55), and SiO(5–4) line emission at the spatial resolution of 50 au. We detect extended SO emission, peaking towards the A and B protostars. Emission blue-shifted down to 6.6 km s−1 reveals for the first time a long (∼ 2000 au) accelerating streamer plausibly feeding the VLA1623 B protostar. Using SO, we derive for the first time an estimate of the excitation temperature of an accreting streamer: 33 ± 9 K. The SO column density is ∼ 1014 cm−2, and the SO/H2 abundance ratio is ∼ 10−8. The total mass of the streamer is 3 × 10−3M⊙, while its accretion rate is 3–5 × 10−7M⊙ yr−1. This is close to the mass accretion rate of VLA1623 B, in the 0.6–3 × 10−7M⊙ yr−1 range, showing the importance of the streamer in contributing to the mass of protostellar discs. The highest blue- and red-shifted SO velocities behave as the SiO(5–4) emission, the latter species detected for the first time in VLA1623-2417: the emission is compact (100–200 au), and associated only with the B protostar. The SO excitation temperature is ∼ 100 K, supporting the occurrence of shocks associated with the jet, traced by SiO.</jats:p>

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