FAUST
Astronomy and Astrophysics, vol. 684, pp. L12
Abstract
Context. The origin of the chemical diversity observed around low-mass protostars probably resides in the earliest history of these systems. Aims. We aim to investigate the impact of protostellar feedback on the chemistry and grain growth in the circumstellar medium of multiple stellar systems. Methods. In the context of the ALMA Large Program FAUST, we present high-resolution (50 au) observations of CH3OH, H2CO, and SiO and continuum emission at 1.3 mm and 3 mm towards the Corona Australis star cluster. Results. Methanol emission reveals an arc-like structure at ∼1800 au from the protostellar system IRS7B along the direction perpendicular to the major axis of the disc. The arc is located at the edge of two elongated continuum structures that define a cone emerging from IRS7B. The region inside the cone is probed by H2CO, while the eastern wall of the arc shows bright emission in SiO, a typical shock tracer. Taking into account the association with a previously detected radio jet imaged with JVLA at 6 cm, the molecular arc reveals for the first time a bow shock driven by IRS7B and a two-sided dust cavity opened by the mass-loss process. For each cavity wall, we derive an average H2 column density of ∼7 × 1021 cm−2, a mass of ∼9 × 10−3 M⊙, and a lower limit on the dust spectral index of 1.4. Conclusions. These observations provide the first evidence of a shock and a conical dust cavity opened by the jet driven by IRS7B, with important implications for the chemical enrichment and grain growth in the envelope of Solar System analogues.
Authors 57
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Arcetri Astrophysical Observatory · National Institute for Astrophysics
Affiliation as printed
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Arcetri Astrophysical Observatory · National Institute for Astrophysics
Affiliation as printed
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Centre National de la Recherche Scientifique · Arcetri Astrophysical Observatory · Institut de Planétologie et d'Astrophysique de Grenoble · National Institute for Astrophysics · Université Grenoble Alpes
Affiliation as printed
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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Shibaura Institute of Technology
Affiliation as printed
Materials Science and Engineering, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
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European Southern Observatory · Arcetri Astrophysical Observatory · National Institute for Astrophysics
Affiliation as printed
European Southern Observatory, Karl-Schwarzschild Str. 2, 85748 Garching bei München, Germany
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Affiliation as printed
Excellence Cluster ORIGINS, Boltzmannstraße, 2D-85748 Garching, Germany
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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National Radio Astronomy Observatory
Affiliation as printed
National Radio Astronomy Observatory, PO Box O Socorro, NM 87801, USA
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Affiliation as printed
RIKEN Cluster for Pioneering Research, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
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National Radio Astronomy Observatory
Affiliation as printed
National Radio Astronomy Observatory, PO Box O Socorro, NM 87801, USA
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Arcetri Astrophysical Observatory · National Institute for Astrophysics · University of Bologna
Affiliation as printed
Dipartimento di Fisica e Astronomia “Augusto Righi”, Viale Berti Pichat 6/2, Bologna, Italy
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Affiliation as printed
Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Affiliation as printed
Department of Chemistry, Biology, and Biotechnology, The University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University, PO Box 9513 2300 RA Leiden, The Netherlands
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Center for Astrochemical Studies, Max-Planck-Institut für extraterrestrische Physik (MPE), Gieenbachstr. 1, 85741 Garching, Germany
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Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse
Affiliation as printed
IRAP, Univ. de Toulouse, CNRS, CNES, UPS, Toulouse, France
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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Affiliation as printed
Astrochemistry Laboratory, Code 691, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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Centre National de la Recherche Scientifique · Université Paris Sciences et Lettres · Observatoire de Paris · Sorbonne Université · Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères · CY Cergy Paris Université
Affiliation as printed
CY Cergy Paris Université, Sorbonne Université, Observatoire de Paris, PSL University, CNRS, LERMA, 95000 Cergy, France
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Affiliation as printed
School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
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Arcetri Astrophysical Observatory · National Institute for Astrophysics
Affiliation as printed
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Affiliation as printed
Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, PR China
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Arcetri Astrophysical Observatory · Max Planck Institute for Extraterrestrial Physics · National Institute for Astrophysics
Affiliation as printed
Center for Astrochemical Studies, Max-Planck-Institut für extraterrestrische Physik (MPE), Gieenbachstr. 1, 85741 Garching, Germany
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Affiliation as printed
Department of Basic Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
Komaba Institute for Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
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Affiliation as printed
Center for Frontier Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Affiliation as printed
Department of Chemistry, University of Virginia, McCormick Road, PO Box 400319 Charlottesville, VA 22904, USA
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National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka-shi, Tokyo 181-8588, Japan
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Affiliation as printed
Department of Physics and Astronomy, Rice University, 6100 Main Street, MS-108 Houston, TX 77005, USA
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Consejo Superior de Investigaciones Científicas · Centro de Astrobiología
Affiliation as printed
Centro de Astrobiologíña (CSIC-INTA), Ctra. de Torrejón a Ajalvir, km 4, 28850, Torrejón de Ardoz, Spain
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Herzberg Institute of Astrophysics · University of Victoria
Affiliation as printed
Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P 5C2, Canada
NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
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Centre National de la Recherche Scientifique · Université de Bordeaux · Laboratoire d'Astrophysique de Bordeaux
Affiliation as printed
Université de Bordeaux – CNRS Laboratoire d’Astrophysique de Bordeaux, 33600 Pessac, France
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Centre National de la Recherche Scientifique · Institut de Radioastronomie Millimétrique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
Institut de Radioastronomie Millimétrique, 38406 Saint-Martin d’Hères, France
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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Universidad Nacional Autónoma de México
Affiliation as printed
Instituto de Astronomía, Univ. Nacional Autonoma de Mexico, Ciudad Universitaria, A.P. 70-264, Cuidad de Mexico 04510, Mexico
Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, A.P. 3-72 (Xangari), 8701 Morelia, Mexico
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Institute of Astronomy and Astrophysics, Academia Sinica · Academia Sinica
Affiliation as printed
Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No.1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan, R.O.C
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Centre National de la Recherche Scientifique · Institut de Radioastronomie Millimétrique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
Institut de Radioastronomie Millimétrique, 38406 Saint-Martin d’Hères, France
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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Affiliation as printed
European Southern Observatory, Karl-Schwarzschild Str. 2, 85748 Garching bei München, Germany
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Center for Astrochemical Studies, Max-Planck-Institut für extraterrestrische Physik (MPE), Gieenbachstr. 1, 85741 Garching, Germany
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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Affiliation as printed
European Southern Observatory, Karl-Schwarzschild Str. 2, 85748 Garching bei München, Germany
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National Radio Astronomy Observatory
Affiliation as printed
National Radio Astronomy Observatory, PO Box O Socorro, NM 87801, USA
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National Astronomical Observatory of Japan
Affiliation as printed
Division of Science, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
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Affiliation as printed
Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo, Hokkaido 060-0819, Japan
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Affiliation as printed
RIKEN Cluster for Pioneering Research, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
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RIKEN · The University of Tokyo
Affiliation as printed
Department of Physics, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
RIKEN Cluster for Pioneering Research, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
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Kyoto University · Yukawa Institute for Theoretical Physics · The University of Tokyo
Affiliation as printed
Department of Physics, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Yukawa Institute for Theoretical Physics, Kyoto Univ. Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto-shi, Kyoto-fu 606-8502, Japan
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Center for Astrochemical Studies, Max-Planck-Institut für extraterrestrische Physik (MPE), Gieenbachstr. 1, 85741 Garching, Germany
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Universitat Autònoma de Barcelona
Affiliation as printed
Departament de Quíñmica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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University of Electro-Communications
Affiliation as printed
Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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The University of Texas at Austin
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Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Austin, TX 78712, USA
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Affiliation as printed
Steward Observatory, 933 N Cherry Ave., Tucson, AZ 85721, USA
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Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · Institut de Recherche en Astrophysique et Planétologie · Université de Toulouse
Affiliation as printed
IRAP, Univ. de Toulouse, CNRS, CNES, UPS, Toulouse, France
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University, PO Box 9513 2300 RA Leiden, The Netherlands
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Affiliation as printed
Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo, Hokkaido 060-0819, Japan
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Affiliation as printed
RIKEN Cluster for Pioneering Research, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
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Affiliation as printed
Star and Planet Formation Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
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The Graduate University for Advanced Studies, SOKENDAI
Affiliation as printed
SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa 240-0193, Japan
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