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Title: Laboratory unraveling of matter accretion in young stars

Abstract

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. Here, 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. Our finding demonstrates one possible structure reconciling current discrepancies between mass accretion rates derived from x-ray and optical observations, respectively.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7];  [8]; ORCiD logo [9]; ORCiD logo [10]; ORCiD logo [11]; ORCiD logo [12]; ORCiD logo [10]; ORCiD logo [13];  [8];  [14];  [15]; ORCiD logo [16];  [4] more »; ORCiD logo [11];  [9];  [4]; ORCiD logo [2]; ORCiD logo [1] « less
  1. Russian Academy of Sciences (RAS), Novgorod (Russian Federation). Inst. of Applied Physics; National Centre for Scientific Research (CNRS), Univ. of Paris, and Univ. of Pierre and Marie Curie, Paris (France)
  2. National Inst. for Astrophysics (INAF), Firenze (Italy). Palermo Astronomical Observatory; Univ. of Palermo (Italy). Dept. of Physics and Chemistry
  3. Sorbonne Univ. and Research Univ., Paris (France)
  4. National Research Nuclear Univ., Moscow (Russia). Moscow Engineering Physics Inst.; Russian Academy of Sciences (RAS), Moscow (Russian Federation). Joint Inst. for High Temperatures
  5. Univ. of Palermo (Italy). Dept. of Physics and Chemistry
  6. National Centre for Scientific Research (CNRS), Univ. of Paris, and Univ. of Pierre and Marie Curie, Paris (France); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  7. National Inst. for Astrophysics (INAF), Firenze (Italy). Palermo Astronomical Observatory
  8. National Lab. of Intense Magnetic Fields (LNCMI), Toulouse (France)
  9. Heinrich Heine Univ., Dusseldorf (Germany). Inst. for Laser and Plasma Physics
  10. Queen's Univ., Belfast, Northern Ireland (United Kingdom). Centre for Plasma Physics
  11. Russian Academy of Sciences (RAS), Novgorod (Russian Federation). Inst. of Applied Physics
  12. GSI-Darmstadt (Germany)
  13. National Inst. for Scientific Research (INRS-EMT), Varennes, QC (Canada)
  14. National Centre for Scientific Research (CNRS), Univ. of Paris, and Univ. of Pierre and Marie Curie, Paris (France); Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
  15. Univ. of Las Palmas, Gran Canaria (Spain). Dept. of Physics
  16. Russian Academy of Sciences (RAS), Moscow (Russian Federation). Joint Inst. for High Temperatures
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1416489
Report Number(s):
LLNL-JRNL-742097
Journal ID: ISSN 2375-2548
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 70 PLASMA PHYSICS AND FUSION

Citation Formats

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, and Fuchs, Julien. Laboratory unraveling of matter accretion in young stars. United States: N. p., 2017. Web. doi:10.1126/sciadv.1700982.
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. Laboratory unraveling of matter accretion in young stars. United States. doi:10.1126/sciadv.1700982.
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, and Fuchs, Julien. Wed . "Laboratory unraveling of matter accretion in young stars". United States. doi:10.1126/sciadv.1700982.
@article{osti_1416489,
title = {Laboratory unraveling of matter accretion in young stars},
author = {Revet, Guilhem and Chen, Sophia N. and Bonito, Rosaria and Khiar, Benjamin and Filippov, Evgeny and Argiroffi, Costanza and Higginson, Drew P. and Orlando, Salvatore and Béard, Jérôme and Blecher, Marius and Borghesi, Marco and Burdonov, Konstantin and Khaghani, Dimitri and Naughton, Kealan and Pépin, Henri and Portugall, Oliver and Riquier, Raphael and Rodriguez, Rafael and Ryazantsev, Sergei N. and Yu. Skobelev, Igor and Soloviev, Alexander and Willi, Oswald and Pikuz, Sergey and Ciardi, Andrea and Fuchs, Julien},
abstractNote = {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. Here, 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. Our finding demonstrates one possible structure reconciling current discrepancies between mass accretion rates derived from x-ray and optical observations, respectively.},
doi = {10.1126/sciadv.1700982},
journal = {Science Advances},
number = 11,
volume = 3,
place = {United States},
year = {Wed Nov 01 00:00:00 EDT 2017},
month = {Wed Nov 01 00:00:00 EDT 2017}
}

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