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arXiv 1107.2783astro-ph.HEastro-ph.GA
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W43星系团的红外和射电研究:分辨的双星和非热辐射

Infrared and radio study of the W43 cluster: resolved binaries and non-thermal emission

P. L. Luque-Escamilla, A. J. Muñoz-Arjonilla, J. R. Sánchez-Sutil, J. Martí, J. A. Combi, E. Sánchez-Ayaso

摘要:

内容:最近从W 43恒星形成区方向探测到的甚高能量(VHE)伽马射线发射促使我们详细研究其恒星星族,试图了解是否可能存在关联。目的:我们寻找可能的对应物(S)的伽马射线源或它们的任何线索,如非热同步辐射作为相对论粒子的示踪剂,通常涉及VHE发射的合理物理场景。方法:我们对几个成功程度不同的档案数据库进行数据挖掘。最重要的结果来自无线电和近红外档案数据。结果如下:先前已知的沃尔夫-拉叶星在W 43中央星团和另一个星团成员似乎被分解成两个组成部分,这表明它可能是一个双星。此外,扩展的无线电发射与一个明显的负谱指数被检测到与W 43集群一致。这些发现可能对可能的伽马射线发射场景产生重要影响,我们也简要讨论了这一点。

英文摘要:

Context: The recent detection of very high-energy (VHE) gamma-ray emission from the direction of the W43 star-forming region prompted us to investigate its stellar population in detail in an attempt to see wether or not it is possible an association. Aims: We search for the possible counterpart(s) of the gamma-ray source or any hints of them, such as non-thermal synchrotron emission as a tracer of relativistic particles often involved in plausible physical scenarios for VHE emission. Methods: We data-mined several archival databases with different degrees of success. The most significant results came from radio and near-infrared archival data. Results: The previously known Wolf-Rayet star in the W43 central cluster and another cluster member appear to be resolved into two components,suggesting a likely binary nature. In addition, extended radio emission with a clearly negative spectral index is detected in coincidence with the W43 cluster. These findings could have important implications for possible gamma-ray emitting scenarios, which we also briefly discuss.

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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