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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >X-ray spectroscopy of SN 1006 with Suzaku
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X-ray spectroscopy of SN 1006 with Suzaku

机译：朱雀SN 1006的X射线光谱

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We report on observations of SN 1006 with Suzaku. We firmly detected K-shell emission from Fe, for the first time, and found that the Fe ionization state is quite low. The broad-band spectrum extracted from southeast of the remnant was well-fitted with a model consisting of three optically thin thermal non-equilibrium ionization plasmas and a power-law component. Two of the thermal models are highly overabundant in heavy elements, and hence are likely due to ejecta. These components have different ionization parameters, n(e)t similar to 1.4 x 10(10) cm(-3) s and n(e)t similar to 7.7 x 10(8) cm(-3) s; it is the later one that produces Fe-K emission. This suggests that Fe has been heated by reverse shock more recently than the other elements, consistent with a picture where the ejecta are stratified by composition with Fe in the interior. On the other hand, the third thermal component is assumed to be solar abundance, and we associate it with emission from the interstellar medium. The electron temperature (kT(e) similar to 0.5 keV) is lower than that expected from the shock velocity, which suggests a lack of collisionless electron heating at the forward shock. The extremely low ionization parameter and extreme non-equilibrium state are due to the low density of the ambient medium.
机译：用朱雀报告SN 1006的观察。我们首次牢固地检测到Fe的K壳发射，发现Fe的电离态非常低。从残余物东南提取的宽带光谱与由三个光学上稀薄的热非平衡电离等离子体和幂律分量组成的模型很好地拟合。其中两个热模型在重元素中高度过量，因此可能是由于喷射所致。这些成分具有不同的电离参数，n（e）t类似于1.4 x 10（10）cm（-3）s，n（e）t类似于7.7 x 10（8）cm（-3）s;后者是产生Fe-K发射的物质。这表明铁比其他元素受反冲击加热的时间更近，这与内部由铁组成的喷射层分层的照片一致。另一方面，假定第三热成分是太阳丰度，我们将其与星际介质的辐射相关联。电子温度（kT（e）类似于0.5 keV）低于冲击速度所预期的温度，这表明在正向冲击时缺乏无碰撞电子加热。极低的电离参数和极高的非平衡态归因于环境介质的低密度。

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