激波-云相互作用对超新星遗迹rcw86非热x射线辐射的影响

IF 2.2 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Aya Bamba, Hidetoshi Sano, Ryo Yamazaki, Jacco Vink
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引用次数: 0

摘要

超新星残余激波的周围环境对加速电子产生的非热x射线的影响,是否与致密物质相互作用,是一个悬而未决的问题。我们利用XMM-Newton对rcw86的激波-云相互作用区域进行了空间分辨x射线光谱分析。用12CO和H - i发射谱线观测,发现明亮的软x射线细丝围绕着致密云。与没有相互作用的细丝相比,这些细丝在热x射线发射中更亮,在同步加速器x射线中更暗,可能更软。我们的研究结果表明,由于与云的相互作用,激波减速,导致热x射线发射增强。这可能也解释了较软的x射线同步加速器组件,因为它意味着那些穿过低密度环境的激波,因此减速更少,可以成为更有效的加速器。这与SN 1006和第谷相似,与RX J1713.7−3946相反。残余物之间的这种差异可能是由于致密物质与激波相互作用的块状,这应该在未来的观测中加以研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the influence of shock–cloud interactions on the nonthermal X-ray emission from the supernova remnant RCW 86
Abstract The effect of the surrounding environment of supernova remnant shocks on nonthermal X-rays from accelerated electrons, with or without interacting dense material, is an open issue. We conduct spatially resolved X-ray spectroscopy of the shock–cloud interacting region of RCW 86 with XMM–Newton. It is found that bright soft X-ray filaments surround the dense cloud, observed with 12CO and H i emission lines. These filaments are brighter in thermal X-ray emission, and fainter and possibly softer in synchrotron X-rays, compared to those without interaction. Our results show that the shock decelerates due to the interaction with clouds, which results in an enhancement of thermal X-ray emission. This could possibly also explain the softer X-ray synchrotron component, because it implies that those shocks that move through a low-density environment, and therefore decelerate much less, can be more efficient accelerators. This is similar to SN 1006 and Tycho, and is in contrast to RX J1713.7−3946. This difference among remnants may be due to the clumpiness of dense material interacting with the shock, which should be examined in future observations.
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来源期刊
Publications of the Astronomical Society of Japan
Publications of the Astronomical Society of Japan 地学天文-天文与天体物理
CiteScore
4.10
自引率
13.00%
发文量
98
审稿时长
4-8 weeks
期刊介绍: Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.
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