دورية أكاديمية
Modeling a Carrington-scale Stellar Superflare and Coronal Mass Ejection from κ 1 Cet .
| العنوان: | Modeling a Carrington-scale Stellar Superflare and Coronal Mass Ejection from κ 1 Cet . |
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| المؤلفون: | Lynch BJ; Space Sciences Laboratory, University of California-Berkeley, Berkeley, CA 94720, USA., Airapetian VS; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.; Department of Physics, American University, Washington, D.C. 20016, USA., DeVore CR; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA., Kazachenko MD; Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA., Lüftinger T; Department of Astrophysics, University of Vienna, Vienna, Austria., Kochukhov O; Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden., Rosén L; Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden., Abbett WP; Space Sciences Laboratory, University of California-Berkeley, Berkeley, CA 94720, USA. |
| المصدر: | The Astrophysical journal [Astrophys J] 2019 Aug 03; Vol. 880 (2). Date of Electronic Publication: 2019 Jul 30. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Published by the University of Chicago Press for the American Astronomical Society Country of Publication: United States NLM ID: 9890633 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0004-637X (Print) Linking ISSN: 0004637X NLM ISO Abbreviation: Astrophys J Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: [Chicago] Published by the University of Chicago Press for the American Astronomical Society. |
| مستخلص: | Observations from the Kepler mission have revealed frequent superflares on young and active solar-like stars. Superflares result from the large-scale restructuring of stellar magnetic fields, and are associated with the eruption of coronal material (a coronal mass ejection, or CME) and energy release that can be orders of magnitude greater than those observed in the largest solar flares. These catastrophic events, if frequent, can significantly impact the potential habitability of terrestrial exoplanets through atmospheric erosion or intense radiation exposure at the surface. We present results from numerical modeling designed to understand how an eruptive superflare from a young solar-type star, κ 1 Cet , could occur and would impact its astrospheric environment. Our data-inspired, three-dimensional magnetohydrodynamic modeling shows that global-scale shear concentrated near the radial-field polarity inversion line can energize the closed-field stellar corona sufficiently to power a global, eruptive superflare that releases approximately the same energy as the extreme 1859 Carrington event from the Sun. We examine proxy measures of synthetic emission during the flare and estimate the observational signatures of our CME-driven shock, both of which could have extreme space-weather impacts on the habitability of any Earth-like exoplanets. We also speculate that the observed 1986 Robinson-Bopp superflare from κ 1 Cet was perhaps as extreme for that star as the Carrington flare was for the Sun. |
| References: | Astrophys J. 2018 Mar 20;856(1):. (PMID: 29628520) Sol Phys. 2017;292(1):25. (PMID: 32355368) Sol Phys. 2018;293(10):135. (PMID: 30393399) Astrophys J Lett. 2018 Mar 20;856(1):. (PMID: 32944211) Nature. 2012 May 16;485(7399):478-81. (PMID: 22622572) Astrobiology. 2005 Dec;5(6):706-25. (PMID: 16379526) |
| معلومات مُعتمدة: | United States SCMD-Heliophysics Science Heliophysics NASA |
| فهرسة مساهمة: | Keywords: Sun: coronal mass ejections (CMEs); Sun: flares; magnetohydrodynamics (MHD); solar-terrestrial relations; stars: magnetic field; stars: solar-type |
| تواريخ الأحداث: | Date Created: 20200328 Latest Revision: 20231113 |
| رمز التحديث: | 20231113 |
| مُعرف محوري في PubMed: | PMC7094772 |
| DOI: | 10.3847/1538-4357/ab287e |
| PMID: | 32214410 |
| قاعدة البيانات: | MEDLINE |
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