Unusual behavior in radio supernova SN 1993J

被引：0
|
作者：
Chandra, Poonam [1 ]
机构：
[1] Natl Radio Astron Observ, Charlottesville, VA 22903 USA
来源：
SUPERNOVA 1987A: 20 YEARS AFTER: SUPERNOVAE AND GAMMA-RAY BURSTERS | 2007年 / 937卷
关键词：
supernovae; 1993J; radio observations; magnetic field; synchrotron process;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Here we present two near-simultaneous spectra of a Type IIb supernova, SN 1993J taken around day similar to 3200 and similar to 3700, observed with the Giant Meterwave Radio Telescope (GMRT) and Very Large Array (VLA). We show the synchrotron cooling break in the optically thin part of both the spectra. Based on these two spectra 1.5 years apart, cooling break frequency seems to be evolving with time. We calculate the magnetic field evolution and put constraints on electron diffusion coefficient from the evolution in break frequency.
引用
收藏
页码：331 / 338
页数：8
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