Laboratory unraveling of matter accretion in young stars
| Autor: | Revet, Guilhem, Chen, Sophia N., Bonito, Rosaria, Khiar, Benjamin, Filippov, Evgeny, Argiroffi, Costanza, Higginson, Drew P., Orlando, Salvatore, Béard, Jérôme, Blecher, Marius, Borghesi, Marco, Burdonov, Konstantin, Khaghani, Dimitri, Naughton, Kealan, Pépin, Henri, Portugall, Oliver, Riquier, Raphael, Rodriguez, Rafael, Ryazantsev, Sergei N., Yu. Skobelev, Igor, Soloviev, Alexander, Willi, Oswald, Pikuz, Sergey, Ciardi, Andrea, Fuchs, Julien |
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| Přispěvatelé: | Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institute of Applied Physics (IAP, Nizhny Novgorod), Istituto Nazionale di Astrofisica (INAF), Dipartimento di Fisica e Chimica [Palermo] (DiFC), Università degli studi di Palermo - University of Palermo, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), The National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) [Moscow, Russia], Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Lawrence Livermore National Laboratory (LLNL), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut für Laser und Plasmaphysik, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Queen's University [Belfast] (QUB), Gesellschaft für Schwerionenforschung, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Énergie Matériaux Télécommunications - INRS (EMT-INRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal = University of Québec in Montréal (UQAM), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), University of Las Palmas de Gran Canaria (ULPGC), ANR-12-BS09-0025,SILAMPA,Simuler en laboratoire des écoulements de plasmas magnétisés pour l'astrophysique(2012), ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), ITA, USA, GBR, FRA, DEU, ESP, CAN, RUS, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Revet, Guilhem, Chen, Sophia N., Bonito, Rosaria, Khiar, Benjamin, Filippov, Evgeny, Argiroffi, Costanza, Higginson, Drew P., Orlando, Salvatore, Béard, Jérôme, Blecher, Mariu, Borghesi, Marco, Burdonov, Konstantin, Khaghani, Dimitri, Naughton, Kealan, Pépin, Henri, Portugall, Oliver, Riquier, Raphael, Rodriguez, Rafael, Ryazantsev, Sergei N., Skobelev, Igor Yu., Soloviev, Alexander, Willi, Oswald, Pikuz, Sergey, Ciardi, Andrea, Fuchs, Julien |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
HOT
ELECTRON THERMAL CONDUCTION PLASMA T-TAURI STARS Astrophysics::High Energy Astrophysical Phenomena MAGNETIC-FIELD CLOUDS SciAdv r-articles Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics SIMULATIONS X-RAY-EMISSION Settore FIS/05 - Astronomia E Astrofisica GAS Physical Sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Research Articles Astrophysics::Galaxy Astrophysics Research Article RADIATIVE SHOCKS |
| Zdroj: | Science Advances Science Advances, American Association for the Advancement of Science (AAAS), 2017, 3 (11), pp.e1700982. ⟨10.1126/sciadv.1700982⟩ Science Advances, 2017, 3 (11), pp.e1700982. ⟨10.1126/sciadv.1700982⟩ |
| ISSN: | 2375-2548 |
| Popis: | When matter accretes onto a young star, a shell of dense material can form around the impact, reducing its x-ray emission. Accretion dynamics in the formation of young stars is still a matter of debate because of limitations in observations and modeling. Through scaled laboratory experiments of collimated plasma accretion onto a solid in the presence of a magnetic field, we open a first window on this phenomenon by tracking, with spatial and temporal resolution, the dynamics of the system and simultaneously measuring multiband emissions. We observe in these experiments that matter, upon impact, is ejected laterally from the solid surface and then refocused by the magnetic field toward the incoming stream. This ejected matter forms a plasma shell that envelops the shocked core, reducing escaped x-ray emission. This finding demonstrates one possible structure reconciling current discrepancies between mass accretion rates derived from x-ray and optical observations, respectively. |
| Databáze: | OpenAIRE |
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