Events Calendar
Towards Understanding of Shock Acceleration
Thursday February 13, 2014
| 2:00 pm
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Presenter: | Andrey Beresnyak (LANL) |
|---|---|---|
| Series: | Center for Astrophysics Research and Technologies Seminar Series | |
| Abstract: | Acceleration of cosmic rays in supernova remnants is probably the best studied case of shock acceleration. It is hypothesized to produce cosmic rays up to energies of 10^15 eV. The observed thin X-ray rims and short timescale variability suggest strong amplification of magnetic field near the shock. In fact: a) without field amplification *in front* of the shock the acceleration will be negligible; b) the amplification in front of the shock requires the action of cosmic rays themselves. I will overview some popular approaches to solve this problem, such as streaming instability, Bell instability and turbulence excited by the baroclinic term. I will also talk about some recent progress and discuss if it is possible to explain rapid acceleration, as well as rapid variability. | |
| Host: | Gregory Taylor | |
| Location: | PAIS-2540, PAIS | |
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