Galactic Sources Detected in the NuSTAR Serendipitous Survey-猫眼课题宝

NuSTAR 偶然巡天探测到的星系源

DOI：

10.3847/1538-4365/aa7517

发表时间：

2017

期刊：

The Astrophysical Journal Supplement Series

影响因子：

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中科院分区：

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作者：

J. Tomsick;G. Lansbury;F. Rahoui;M. Clavel;F. Fornasini;Jaesub Hong;J. Aird;D. Alexander;A. Bodaghee;J. Chiu;J. Grindlay;C. Hailey;F. Harrison;R. Krivonos;K. Mori;D. Stern

核分光望远镜阵列（努斯塔）在10千电子伏以上能量的灵敏度方面比非聚焦卫星提高了两个数量级，从而有可能更深入地探测银河系和宇宙。Lansbury和合作者最近完成了一个包含497个源的目录，这些源是使用13 deg 2的努斯塔覆盖范围在3-24 keV波段偶然发现的。在这里，我们报告的光学和X射线研究的16个银河系的来源目录。我们确定其中8颗是恒星（但部分或全部可能有双星伴星），并使用来自盖亚的信息报告其中3颗的距离和X射线光度。有4个CV或CV候选者，我们认为努斯塔J233426-2343.9是一个相对较强的CV候选者，部分基于XMM-牛顿的X射线光谱。努斯塔J 092418 -3142.2是Lansbury星表中最亮的偶然源，努斯塔J 073959 -3147.8是低质量X射线双星候选者，但这两个源也可能是CV。其中一个来源是已知的高质量X射线双星（HMXB），而努斯塔J105008-5958.8是一个新的HMXB候选者，在其光谱和硬X射线光谱中具有强的巴耳末发射线。我们讨论了发现这些HMXB的表面密度（对数N-对数S）和银河系HMXB的光度函数的影响。我们的结论是，由于努斯塔在8-24 keV波段检测到银河平面中的大部分未分类源，因此可能存在大量低光度HMXBs。

The Nuclear Spectroscopic Telescope Array (NuSTAR) provides an improvement in sensitivity at energies above 10 keV by two orders of magnitude over non-focusing satellites, making it possible to probe deeper into the Galaxy and universe. Lansbury and collaborators recently completed a catalog of 497 sources serendipitously detected in the 3–24 keV band using 13 deg2 of NuSTAR coverage. Here, we report on an optical and X-ray study of 16 Galactic sources in the catalog. We identify 8 of them as stars (but some or all could have binary companions), and use information from Gaia to report distances and X-ray luminosities for 3 of them. There are 4 CVs or CV candidates, and we argue that NuSTAR J233426–2343.9 is a relatively strong CV candidate based partly on an X-ray spectrum from XMM-Newton. NuSTAR J092418–3142.2, which is the brightest serendipitous source in the Lansbury catalog, and NuSTAR J073959–3147.8 are low-mass X-ray binary candidates, but it is also possible that these 2 sources are CVs. One of the sources is a known high-mass X-ray binary (HMXB), and NuSTAR J105008–5958.8 is a new HMXB candidate that has strong Balmer emission lines in its optical spectrum and a hard X-ray spectrum. We discuss the implications of finding these HMXBs for the surface density (log N–log S) and luminosity function of Galactic HMXBs. We conclude that with the large fraction of unclassified sources in the Galactic plane detected by NuSTAR in the 8–24 keV band, there could be a significant population of low-luminosity HMXBs.

NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806

DOI： 10.1088/0004-637x/809/2/140

发表时间： 2015-07

期刊：

The Astrophysical Journal

影响因子： --

作者：

R. Krivonos;S. Tsygankov;A. Lutovinov;J. Tomsick;D. Chakrabarty;M. Bachetti;S. Boggs;M. Chernyakova;F. Christensen;W. Craig;F. Fuerst;C. Hailey;F. Harrison;G. Lansbury;F. Rahoui;D. Stern;W. L. H. U. Berkeley;Ca;Usa;S. R. Institute;R. A. O. Sciences;Moscow;Russia.;T. Observatory;D. Physics;Astronomy;U. Turku;Finland.;Mit Kavli Institute for Astrophysics;S. Research;Cambridge;Ma;O. Midi-Pyrenees;U. Toulouse;France.;Cnrs;Institut de Recherche en Astrophysique et Planetologie-Institut-de-Recherche-en-Astrophysique-et-102437653;Toulouse;Dublin City University;Ireland;Dublin Institute for Advanced Studies;D. S. -. N. S. Institute-D.-S.-.-N.-S.-Institute-1388847304;T. Denmark;Denmark;Lawrence Livermore National Laboratory;Livermore;C. 9. Astronomy;Astrophysics;C. I. O. Technology.;Pasadena;Columbia Astrophysics Laboratory;C. University;New York.;U. Durham;UK.;E. Observatory;G. B. Muenchen;H Germany;D. O. Astronomy;Harvard University;Jet propulsion Laboratory;Nasa Goddard Space Flight Center;Greenbelt;Md

通讯作者：

Galactic Sources Detected in the NuSTAR Serendipitous Survey

NuSTAR 偶然巡天探测到的星系源

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