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Conferences
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ICN-UNAM
1482bc95ee34f0461176da21871284c8
3
icrc2007@icrc2007.unam.mx
30th International Cosmic Ray Conference
The 30th International Cosmic Ray Conference will be held from July 3, 2007 to July 11, 2007 in Merida, Yucatan, Mexico.
True
Merida, Mexico
2007-07-03T08:00:00
2007-07-11T19:00:00
2005-09-26T05:04:53
2024-04-12T17:46:55
Mexico/General
Dr.
IGeof-UNAM
40af9343b8bb9d18708b4f0252d5f53c
244
false
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0
Oral
Electron Injection at Quasi-Perpendicular Supernova Remnant Shocks
Mr.
University of Tokyo
ce07369f5d13672b28b7ae86f526e9fd
Mr.
University of Tokyo
ce07369f5d13672b28b7ae86f526e9fd
Prof.
University of Tokyo
486f5c12985efd7028f942b713e25daf
Merida, Mexico
Uxmal + Tulum (Holiday Inn)
2007-07-07T08:42:00
2007-07-07T08:54:00
00:12
Electron injection process at high Mach number collisionless quasiperpendicular shock
waves is investigated by means of one-dimensional electromagnetic particle-in-cell
simulations. We find that energetic electrons are generated through the following two
steps: (1) electrons are accelerated nearly perpendicular to the local magnetic field
by shock surfing acceleration at the leading edge of the shock transition region. (2)
the preaccelerated electrons are further accelerated by shock drift acceleration. As
a result, energetic electrons are preferentially reflected back to the upstream.
Shock surfing acceleration provides sufficient energy required for the reflection.
Therefore, it is important not only for the energization process by itself, but also
for triggering the secondary acceleration process. We also present a theoretical
model of the two-step acceleration mechanism based on the simulation results, which
can predict the injection efficiency for subsequent diffusive shock acceleration
process. We show that the injection efficiency obtained by the present model agrees
well with the value obtained by Chandra X-ray observations of SN 1006. At typical
supernova remnant shocks, energetic electrons injected by the present mechanism can
self-generate upstream Alfven waves, which scatter the energetic electrons themselves.
1
More information about the venue
http://www.icrc2007.unam.mx/
link
http://www.icrc2007.unam.mx/
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