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arXiv 1301.0844astro-ph.HE
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高分辨率的SN 1987 A

SN 1987A at High Resolution

Daniel Dewey

摘要:

在ROSAT的接力棒下,钱德拉HETG和XMM-牛顿RGS对SN 1987 A的早期观测显示出宽线,半高宽为10^4 km/s:SN爆炸波继续冲击SN 1987 A周围的H II区域。从那时起,它风景如画的赤道环(ER)受到了冲击,产生了一个不断增长的,占主导地位的窄线组成部分。即便如此,目前的HETG和RGS观测表明,一个广泛的组成部分仍然存在,并贡献了20%的0.5- 2 keV通量。SN 1987 A的X射线行为可以用最少的自由参数作为两个简单的一维流体动力学模拟的总和来建模:i)与H II区材料的持续相互作用产生宽发射线和大部分3- 10 keV通量,以及ii)与占主导地位的0.5- 2 keV通量的致密的clusterER材料的相互作用。展望未来,我们预测继续增长的广泛的组成部分,但在0.5- 2千电子伏通量下降,一旦没有新的致密ER材料被冲击。什么时候?时间和新的数据会告诉我们。

英文摘要:

Handed the baton from ROSAT, early observations of SN 1987A with the Chandra HETG and the XMM-Newton RGS showed broad lines with a FWHM of 10^4 km/s: the SN blast wave was continuing to shock the H II region around SN 1987A. Since then, its picturesque equatorial ring (ER) has been shocked, giving rise to a growing, dominant narrow-lined component. Even so, current HETG and RGS observations show that a broad component is still present and contributes 20% of the 0.5--2 keV flux. SN 1987A's X-ray behavior can be modeled with a minimum of free parameters as the sum of two simple 1D hydrodynamic simulations: i) an on-going interaction with H II region material producing the broad emission lines and most of the 3--10 keV flux, and ii) an interaction with the dense, clumpy ER material that dominates the 0.5--2 keV flux. Toward the future, we predict a continued growth of the broad component but a drop in the 0.5--2 keV flux, once no new dense ER material is being shocked. When? Time, and new data, will tell.

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