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arXiv 1206.4789astro-ph.HE
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在XMM-牛顿M31大型巡天中探测到的超新星遗迹和候选者

Supernova remnants and candidates detected in the XMM-Newton M31 large survey

Manami Sasaki, Wolfgang Pietsch, Frank Haberl, Despina Hatzidimitriou, Holger Stiele, Benjamin Williams, Albert Kong, Ulrich Kolb

摘要:

我们对M31的XMM-Newton大型计划巡天中发现的M31中的超新星遗迹(SNR)和候选者进行了分析。SNRs是星系中明亮的X射线源之一。它们是一个星系最近恒星形成活动和它们演化的星际环境的良好指标。通过将M31中源的X射线数据与光学数据以及光学和无线电目录相结合,我们的目标是编制一个完整的,修订的M31中发射X射线的SNRs列表,研究它们的光度和空间分布,并了解最亮SNRs的X射线光谱。我们使用XMM-牛顿数据分析了12个最亮SNR和候选者的X射线光谱。这四个最亮的光源使我们能够进行更详细的光谱分析,并比较不同的模型来描述它们的光谱。对于所有的M31大型项目源,我们在本星系团星系巡天的Ha、[Sii]和[Oiii]图像上寻找光学对应物。我们确认21个X射线源作为已知SNR的对应物。此外,我们确定了五个新的X射线源的X射线和光学发射信噪比。17个源不再被视为SNR候选。因此,我们根据它们的X射线,光学和无线电发射,创建了M31中26个X射线SNR和20个候选者的列表,这是M31中X射线SNR的最新完整列表。最亮的信噪比在0.35 - 2.0 keV波段的X射线亮度高达8 x 10^36 erg/s。

英文摘要:

We present the analysis of supernova remnants (SNRs) and candidates in M31 identified in the XMM-Newton large programme survey of M31. SNRs are among the bright X-ray sources in a galaxy. They are good indicators of recent star formation activities of a galaxy and of the interstellar environment in which they evolve. By combining the X-ray data of sources in M31 with optical data as well as with optical and radio catalogues, we aim to compile a complete, revised list of SNRs emitting X-rays in M31 detected with XMM-Newton, study their luminosity and spatial distribution, and understand the X-ray spectrum of the brightest SNRs. We analysed the X-ray spectra of the twelve brightest SNRs and candidates using XMM-Newton data. The four brightest sources allowed us to perform a more detailed spectral analysis and the comparison of different models to describe their spectrum. For all M31 large programme sources we searched for optical counterparts on the Ha, [Sii], and [Oiii] images of the Local Group Galaxy Survey. We confirm 21 X-ray sources as counterparts of known SNRs. In addition, we identify five new X-ray sources as X-ray and optically emitting SNRs. Seventeen sources are no longer considered as SNR candidates. We have thus created a list of 26 X-ray SNRs and 20 candidates in M31 based on their X-ray, optical, and radio emission, which is the most recent complete list of X-ray SNRs in M31. The brightest SNRs have X-ray luminosities of up to 8 x 10^36 erg/s in the 0.35 - 2.0 keV band.

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