FAUST
Astronomy and Astrophysics, vol. 695, pp. A278
Abstract
Context. While protostellar outflows are important in terms of mass accretion and angular momentum transport in star formation processes, high-resolution observations of outflows in protobinary systems are still sparse. Aims. We aim to reveal outflow structures traced by millimeter SiO emission in a low-mass protobinary system, L483. Methods. We observed the SiO (J = 5−4) line in L483 with the Atacama Large Millimeter/submillimeter Array (ALMA) as part of the large program FAUST (Fifty AU STudy of the chemistry in the disk/envelope systems of Solar-like protostars). The spatial and spectral resolutions were 0.39′′×0.30′′ (780 au×60 au) and 122 kHz (0.17 km s−1 at 217 GHz), respectively. The spectral lines of SO, CS, and C18O were also used to study the physical and dynamical properties of the SiO emitting regions. Results. Two SiO emission peaks are identified in the central part of L483, which have offsets of 100 au and 200 au toward the northeast (SiO-peak) and north (SiO-N), respectively, from the continuum peak. The SiO-peak shows only blueshifted emission with a broad linewidth of 5 km s−1, while that of SiO-N corresponds to the systemic velocity. Furthermore, weak and compact SiO emission components are distributed up to 2400 au away from the continuum position. They have narrow linewidths of ∼1 km s−1. One of these components is a blueshifted isolated emission feature, 2400 au northeast of the continuum peak, NE-cloud, located outside the east-west outflow lobes. The SiO abundances relative to H2 are 10−10−10−9 and 10−10 in the central part and more widely distributed components, respectively. These are intermediate values between those of strongly shocked regions caused by high-velocity outflows and quiescent molecular clouds. Conclusions. The central SiO emission could be interpreted as either two different outflows driven by both protostars or as an outflow ejected from one of the circumstellar disks in the binary system. The NE-cloud region is most likely explained as a remnant of an old shock produced by past outflow activity, as has been proposed for the low-mass protostar IRAS 15398–3359. The complex structures of the outflows traced by the SiO line could reflect dynamical processes of the newly formed protobinary system in L483.
Authors 55
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The Graduate University for Advanced Studies, SOKENDAI · National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan
SOKENDAI (The Graduate University for Advanced Studies), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
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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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Kyoto University · Yukawa Institute for Theoretical Physics
Affiliation as printed
Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto-shi, Kyoto-fu 606-8502, Japan
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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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National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan
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National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan
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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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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 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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National Radio Astronomy Observatory
Affiliation as printed
National Radio Astronomy Observatory, PO Box O, Socorro, NM 87801, USA
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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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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 · Arcetri Astrophysical Observatory · Institut de Planétologie et d'Astrophysique de Grenoble · National Institute for Astrophysics · Université Grenoble Alpes
Affiliation as printed
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
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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
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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Arcetri Astrophysical Observatory · National Institute for Astrophysics
Affiliation as printed
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Center for Astrochemical Studies, Max-Planck-Institut für extraterrestrische Physik (MPE), Gieβenbachstr. 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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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
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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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
Instituto Nazionale di Astrofisica (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 · Observatoire de Paris · Max Planck Institute for Extraterrestrial Physics · Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères · National Institute for Astrophysics
Affiliation as printed
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
Laboratoire d'Études du Rayonnement et de la Matière en Astrophysique et Atmosphères (LERMA), Observatoire de Paris, Meudon, France
Max-Planck-Institut für extraterrestrische Physik (MPE), Gieβenbachstr. 1, D-85741 Garching, Germany
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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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Affiliation as printed
Department of Physics and Astronomy, Rice University, 6100 Main Street, MS-108, Houston, TX 77005, USA
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Herzberg Institute of Astrophysics · University of Victoria
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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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National Taiwan Normal University · National Sun Yat-sen University
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Center of Astronomy and Gravitation, National Taiwan Normal University, Taipei 116, Taiwan, ROC
Department of Physics, National Sun Yat-Sen University, No. 70, Lien-Hai Road, Kaohsiung City 80424, Taiwan, ROC
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Harvard University · Universidad Nacional Autónoma de México
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Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA
David Rockefeller Center for Latin American Studies, Harvard University, 1730 Cambridge Street, Cambridge, MA 02138, USA
Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Apartado Postal 3-72, Morelia 58090, Michoacán, Mexico
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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), Gieβenbachstr. 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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National Radio Astronomy Observatory
Affiliation as printed
National Radio Astronomy Observatory, PO Box O, Socorro, NM 87801, USA
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The Graduate University for Advanced Studies, SOKENDAI · National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
SOKENDAI (The Graduate University for Advanced Studies), 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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RIKEN · National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
RIKEN Cluster for Pioneering Research, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, 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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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Center for Astrochemical Studies, Max-Planck-Institut für extraterrestrische Physik (MPE), Gieβenbachstr. 1, 85741 Garching, Germany
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Arcetri Astrophysical Observatory · National Institute for Astrophysics
Affiliation as printed
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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Universitat Autònoma de Barcelona
Affiliation as printed
Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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Arcetri Astrophysical Observatory · National Institute for Astrophysics
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Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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University of Electro-Communications
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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, Texas 78712, USA
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Affiliation as printed
Steward Observatory, 933 N Cherry Ave., Tucson, AZ 85721, USA
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Arcetri Astrophysical Observatory · National Institute for Astrophysics · University of Bologna
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Alma Mater Studiorum – Università di Bologna, Dipartimento di Fisica e Astronomia "Augusto Righi", Via Gobetti 93/2, I-40129, Bologna, Italy
Instituto Nazionale di Astrofisica (INAF), Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
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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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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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Affiliation as printed
Department of Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Rd., Minhang, Shanghai 200240, China
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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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