Speaker
Dr
Leonid Ksenofontov
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
Description
A nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova
remnants (SNRs) is employed to re-examine the nonthermal properties of the
remnant of SN 1987A for an extended evolutionary period of 5-50 yr.
This spherically symmetric model is approximately applied to the different
features of the SNR which consist of a Blue Supergiant (BSG) wind and bubble,
and the swept-up red Supergiant (RSG) wind structures in the form of an HII
region, the "Equatorial Ring" (ER) and the "hourglass" region, all of which
are part of a RSG wind whose mass loss rate significantly decreases with
elevation above the equatorial plane. The model adapts recent three-dimensional
hydrodynamical simulations by Potter et al. (2014). The SNR shock has recently
swept up the ER which is the densest region in the immediate circumstellar environment.
Therefore the expected gamma-ray energy flux at TeV-energies at the current
epoch has already reached its maximal value $\sim 10^{-13}$ erg cm$^{-2}$s$^{-1}$.
The general nonthermal strength of the source is expected to decrease roughly
by a factor of two over the next 10 yrs.
| Registration number following "ICRC2015-I/" | 142 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Prof.
Evgeny Berezhko
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
Co-authors
Prof.
Heinrich Voelk
(Max-Planck-Institute for Nuclear Physics)
Dr
Leonid Ksenofontov
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
