Nonthermal radiation from supernova remnants in the adiabatic stage of evolution.
Nonthermal radiation from supernova remnants in the adiabatic stage of evolution.
复制标题
绝热演化阶段超新星遗迹的非热辐射。
DOI：
10.1086/158868
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
R. Chevalier
中科院分区：
文献类型：
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作者：
S. Reynolds;R. Chevalier
假设相对论性电子在激波中被加速到与激波后压力成正比的能量密度，并且磁场要么被压缩，要么被湍流放大，我们为处于绝热爆炸波（Sedov）演化阶段的超新星遗迹的非热辐射建立了一个物理上自一致的模型。我们将所得的同步加速器剖面与第谷遗迹的观测结果进行了比较，发现如果激波处有一个小的径向有序磁场分量，那么放大磁场模型就能得到充分的拟合。该模型预测第谷的表面亮度以（直径）/sup -4.4/的速度下降，通量以每年0.25%的速度下降。我们将SN 1006遗迹的无特征幂律x射线谱解释为射电发射的延伸：当包括同步加速器损失时，整个谱可以拟合。该模型表明，虽然有百分之几的激波能量进入磁场，但只有2 × 10/sup -5/的激波能量进入相对论性电子。
We develop a physically self-consistent model for nonthermal radiation from supernova remnants in the adiabatic blast-wave (Sedov) phase of evolution, assuming relativistic electrons are accelerated in the shock to an energy density proportional to the postshock pressure, and that the magnetic field is either compressed ambient field or turbulently amplified. We have compared the resulting synchrotron profiles with observations of Tycho's remnant and find the amplified magnetic field model gives an adequate fit if there is a small radially ordered component of the magnetic field at the shock wave. The model predicts that surface brightness of Tycho declines as (diameter)/sup -4.4/ and that the flux declines by 0.25% per year. We explain the featureless power-law X-ray spectrum of the SN 1006 remnant as the extension of the radio emission: the entire spectrum can be fitted when synchrotron losses are included. The model implies that while several percent of the shock energy goes into The magnetic field, only 2 x 10/sup -5/ of the shock energy goes into relativistic electrons.