Magnetic field in supernova remnant SN 1987A

被引：10
|
作者：
Berezhko, E. G. [1 ]
Ksenofontov, L. T. [1 ]
机构：
[1] Yu G Shafer Inst Cosmophys Res & Aeron, Yakutsk 677980, Russia
来源：
ASTROPHYSICAL JOURNAL | 2006年 / 650卷 / 01期
关键词：
acceleration of particles; cosmic rays; radiation mechanisms : nonthermal; shock waves; supernovae : individual (SN 1987A); X-rays : individual (SN 1987A);
D O I：
10.1086/508615
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A nonlinear kinetic theory of cosmic-ray (CR) acceleration in supernova remnants is employed to investigate the properties of the remnant SN 1987A. It is shown that a large downstream magnetic field mG is B-d approximate to 10 mG is required to fit the existing observational data. Such a strong field, together with the strong shock modification due to CR back-reaction, provides the steep and concave radioemission spectrum and considerable synchrotron cooling of high-energy electrons that diminish their X-ray synchrotron flux below the observed Chandra flux, which has to be considered as an upper limit for nonthermal X-ray emission. The expected gamma-ray energy flux at TeV energies at the current epoch is ergs (cm(2) s)(-1).
引用
收藏
页码：L59 / L62
页数：4
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