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Shock Drift Acceler...
Shock Drift Acceleration of Ions in an Interplanetary Shock Observed by MMS
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- Hanson, E. L. M. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
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- Agapitov, O. V. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
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- Vasko, I. Y. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA;Russian Acad Sci, Space Res Inst, Moscow, Russia
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- Mozer, F. S. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
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- Krasnoselskikh, V. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA;Univ Orleans, LPC2E, CNRS, Orleans, France
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- Bale, S. D. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
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- Avanov, L. (författare)
- Univ Maryland, Dept Astron, College Pk, MD 20742 USA;NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
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- Khotyaintsev, Yuri V. (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Giles, B. (författare)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
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(creator_code:org_t)
- 2020-03-06
- 2020
- Engelska.
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Ingår i: Astrophysical Journal Letters. - : IOP PUBLISHING LTD. - 2041-8205 .- 2041-8213. ; 891:1
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- An interplanetary (IP) shock wave was recorded crossing the Magnetospheric Multiscale constellation on 2018 January 8. Plasma measurements upstream of the shock indicate efficient proton acceleration in the IP shock ramp: 2-7 keV protons are observed upstream for about three minutes (similar to 8000 km) ahead of the IP shock ramp, outrunning the upstream waves. The differential energy flux of 2-7 keV protons decays slowly with distance from the ramp toward the upstream region (dropping by about half within 8 Earth radii from the ramp) and is lessened by a factor of about four in the downstream compared to the ramp (within a distance comparable to the gyroradius of similar to keV protons). Comparison with test-particle simulations has confirmed that the mechanism accelerating the solar wind protons and injecting them upstream is classical Shock Drift Acceleration (SDA). This example of observed proton acceleration by a low-Mach, quasi-perpendicular shock may be applicable to astrophysical contexts, such as supernova remnants or the acceleration of cosmic rays.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Interplanetary shocks
- Shocks
- Space plasmas
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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