从活跃恒星到黑洞:银河系 X 射线源的发现工具

IF 3.3 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Antonio C. Rodriguez
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引用次数: 0

摘要

银河系的 X 射线源多种多样,从活跃的 M 矮星到紧凑的天体双星,以及介于两者之间的所有天体。当今的 X 射线天文资源非常丰富,有来自 XMM-牛顿、钱德拉和 Swift 的点源目录,每个目录都有≳105 个源,而且还在不断增加。此外,通过全天空 SRG/eROSITA 勘测发布的数据,X 射线天文学即将发生转变。许多 X 射线源都可以与光学对应源联系起来,在盖亚时代,光学对应源可以通过视差和适当运动信息确定是银河系还是河外星系。在这里,我介绍一个简单的图表--"X 射线主序",它可以根据光学颜色和 X 射线光通量比(FX/Fopt)来区分紧凑天体和活动恒星。作为概念验证,我介绍了利用 X 射线主序列发现的六颗奇异吸积型 WD 的光学光谱,并将其应用于 XMM 牛顿星表。展望不久的将来的巡天观测,我还将介绍利用X射线主序发现的新系统的SDSS-V光学光谱,并将其应用到SRG/eROSITA eFEDS星表中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources
Galactic X-ray sources are diverse, ranging from active M dwarfs to compact object binaries, and everything in between. The X-ray landscape of today is rich, with point source catalogs such as those from XMM-Newton, Chandra, and Swift, each with ≳105 sources and growing. Furthermore, X-ray astronomy is on the verge of being transformed through data releases from the all-sky SRG/eROSITA survey. Many X-ray sources can be associated with an optical counterpart, which in the era of Gaia, can be determined to be Galactic or extragalactic through parallax and proper motion information. Here, I present a simple diagram—the “X-ray Main Sequence,” which distinguishes between compact objects and active stars based on their optical color and X-ray-to-optical flux ratio (FX/Fopt). As a proof of concept, I present optical spectroscopy of six exotic accreting WDs discovered using the X-ray Main Sequence as applied to the XMM-Newton catalog. Looking ahead to surveys of the near future, I additionally present SDSS-V optical spectroscopy of new systems discovered using the X-ray Main Sequence as applied to the SRG/eROSITA eFEDS catalog.
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来源期刊
Publications of the Astronomical Society of the Pacific
Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理
CiteScore
6.70
自引率
5.70%
发文量
103
审稿时长
4-8 weeks
期刊介绍: The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.
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