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arXiv 1302.4452astro-ph.HEastro-ph.GA
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超亮X射线源的赫歇尔观点

Herschel views on ultra-luminous X-ray sources

Mathieu Servillat, Alexis Coleiro, Sylvain Chaty

摘要:

超亮X射线源(ULX)是一种非核的河外X射线源,其亮度超过恒星质量黑洞的爱丁顿光度,其性质仍然是未知的。它们可能是处于超爱丁顿吸积状态的黑洞X射线双星,可能具有显著的辐射,或者它们可能拥有中等质量(10^2到10^5太阳质量)的黑洞。由于辐射的能量巨大,ULX可能与其环境发生强相互作用,特别是如果发射不是光束,并且如果它们拥有一个巨大的黑洞。我们提出了一个项目的早期结果,该项目使用档案赫歇尔红外观测的星系托管明亮的ULXs,以约束周围的ULXs和可能的相互作用的环境的性质。我们已经观察到ULX和冷物质密集云之间的空间相关性,这将在后续工作中量化。这些观测将使我们能够测试与银河系高质量X射线双星环境的相似性。该项目还将揭示宿主星系的性质,以及可能有利于星系中ULX存在的可能因素。

英文摘要:

The nature of ultra-luminous X-ray sources (ULXs), which are off-nuclear extragalactic X-ray sources that exceed the Eddington luminosity for a stellar-mass black hole, is still largely unknown. They might be black hole X-ray binaries in a super-Eddington accretion state, possibly with significant beaming of their emission, or they might harbor a black hole of intermediate mass (10^2 to 10^5 solar masses). Due to the enormous amount of energy radiated, ULXs can have strong interactions with their environment, particularly if the emission is not beamed and if they host a massive black hole. We present early results of a project that uses archival Herschel infrared observations of galaxies hosting bright ULXs in order to constrain the nature of the environment surrounding the ULXs and possible interactions. We already observe a spatial correlation between ULXs and dense clouds of cold material, that will be quantified in subsequent work. Those observations will allow us to test the similarities with the environment of Galactic high mass X-ray binaries. This project will also shed light on the nature of the host galaxies, and the possible factors that could favor the presence of a ULX in a galaxy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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