Identification of 1RXS J165424.6-433758 as a Polar Cataclysmic Variable

IF 4.8 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Astrophysical Journal Pub Date : 2023-11-01 DOI:10.3847/1538-4357/acf831

B. O’Connor, J. Brink, D. A. H. Buckley, K. Mukai, C. Kouveliotou, E. Göğüş, S. B. Potter, P. Woudt, A. Lien, A. Levan, O. Kargaltsev, M. G. Baring, E. Bellm, S. B. Cenko, P. A. Evans, J. Granot, C. Hailey, F. Harrison, D. Hartmann, A. J. van der Horst, D. Huppenkothen, L. Kaper, J. A. Kennea, P. O. Slane, D. Stern, E. Troja, R. A. M. J. Wijers, G. Younes

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引用次数: 1

Abstract

Abstract We present the results of our X-ray, ultraviolet, and optical follow-up campaigns of 1RXS J165424.6-433758, an X-ray source detected with the Swift Deep Galactic Plane Survey. The source X-ray spectrum (Swift and NuSTAR) is described by thermal bremsstrahlung radiation with a temperature of kT = 10.1 ± 1.2 keV, yielding an X-ray (0.3–10 keV8) luminosity L X = (6.5 ± 0.8) × 10 31 erg s −1 at a Gaia distance of 460 pc. Spectroscopy with the Southern African Large Telescope revealed a flat continuum dominated by emission features, demonstrating an inverse Balmer decrement, the λ 4640 Bowen blend, almost a dozen He i lines, and He ii λ 4541, λ 4686, and λ 5411. Our high-speed photometry demonstrates a preponderance of flickering and flaring episodes, and revealed the orbital period of the system, P orb = 2.87 hr, which fell well within the cataclysmic variable (CV) period gap between 2 and 3 hr. These features classify 1RXS J165424.6-433758 as a nearby polar magnetic CV.

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极地突变变量1RXS j165424.6 - 43758的鉴定

摘要:本文介绍了Swift深银面巡天探测到的x射线源1RXS j165424.6 - 43758的x射线、紫外线和光学跟踪活动的结果。源X射线光谱(Swift和NuSTAR)由温度为kT = 10.1±1.2 keV的热轫致辐射描述，在Gaia距离为460 pc处产生X射线(0.3-10 keV8)光度L X =(6.5±0.8)× 10 31 erg s−1。南部非洲大望远镜的光谱显示了一个平坦的连续体，主要是发射特征，显示出反向巴尔默衰减，λ 4640 Bowen混合，近12条He i线，He ii λ 4541， λ 4686和λ 5411。我们的高速光度测量显示了闪烁和耀斑事件的优势，并揭示了系统的轨道周期，P球= 2.87小时，正好落在2到3小时之间的突变变量(CV)周期间隙内。这些特征将1RXS j165424.6 - 43758归类为近极磁CV。

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来源期刊

Astrophysical Journal 地学天文-天文与天体物理

CiteScore

8.40

自引率

30.60%

发文量

2854

审稿时长

1 months

期刊介绍： The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.

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