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NuSTAR and TESS Discovery of an Intermediate Polar IGR J19173+0747

文献类型：期刊论文

作者Yan, Fang-Zhou1; Qian, Sheng-Bang1; Liao WP(廖文萍)2,3
刊名ASTROPHYSICAL JOURNAL
出版日期2026-02-20
卷号998期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ae3da4
产权排序第2完成单位
文献子类Article
英文摘要IGR J19173+0747 was discovered as an X-ray source by the INTEGRAL satellite and was initially classified as either a high-mass X-ray binary (HMXB) or a magnetic cataclysmic variable. Here, we report the detection of a coherent X-ray pulsation with a period of 792.9 +/- 1.1 s in recent NuSTAR data, which we interpret as the spin period of the central compact object. Based on TESS optical photometry, we have also identified a periodic modulation of 793.38 +/- 0.02 s, a value consistent, within uncertainties, with that determined from the X-ray data. This period lies outside the typical orbital period range for polars but falls within the characteristic spin-period range of intermediate polars (IPs). Furthermore, the X-ray spectrum exhibits a clear emission-line feature dominated by a fluorescent Fe K alpha line at 6.4 keV. We derive an X-ray luminosity of LX=1.31-0.56+0.88 & times;1034ergs-1 and an absolute G-band magnitude of MG=5.69-0.56+0.61 for IGR J19173+0747, both of which are consistent with typical values for IPs. Based on these findings, we rule out both the HMXB and polar scenarios and classify IGR J19173+0747 as an IP. Spectral fitting yields a white dwarf mass estimate of 0.948 +/- 0.044 M circle dot for this source.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词PERIOD ; SPIN
资助项目Science Foundation of Yunnan Province[202503AP140013]; Science Foundation of Yunnan Province[202501AS070055]; Science Foundation of Yunnan Province[202401AS070046]; International Partnership Program of Chinese Academy of Sciences[020GJHZ2023030GC]; National Natural Science Foundation of China[12573038]; National Natural Science Foundation of China[12503040]; Postdoctoral Fellowship Program of CPSF[GZC20252095]; China Postdoctoral Science Foundation[2025M773194]; Caiyun Postdoctoral Program in Yunnan Province of China[C615300504124]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001694223000001
出版者IOP Publishing Ltd
资助机构Science Foundation of Yunnan Province[202503AP140013, 202501AS070055, 202401AS070046] ; International Partnership Program of Chinese Academy of Sciences[020GJHZ2023030GC] ; National Natural Science Foundation of China[12573038, 12503040] ; Postdoctoral Fellowship Program of CPSF[GZC20252095] ; China Postdoctoral Science Foundation[2025M773194] ; Caiyun Postdoctoral Program in Yunnan Province of China[C615300504124]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28928]  
专题云南天文台_双星与变星研究组
通讯作者Qian, Sheng-Bang
作者单位1.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China; qiansb@ynu.edu.cn;
2.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, People’s Republic of China;
3.University of Chinese Academy of Sciences, No.1 Yanqihu East Road, Huairou District, Beijing 101408, People’s Republic of China
推荐引用方式
GB/T 7714		 Yan, Fang-Zhou,Qian, Sheng-Bang,Liao WP. NuSTAR and TESS Discovery of an Intermediate Polar IGR J19173+0747[J]. ASTROPHYSICAL JOURNAL,2026,998(2).
APA Yan, Fang-Zhou,Qian, Sheng-Bang,&廖文萍.(2026).NuSTAR and TESS Discovery of an Intermediate Polar IGR J19173+0747.ASTROPHYSICAL JOURNAL,998(2).
MLA Yan, Fang-Zhou,et al."NuSTAR and TESS Discovery of an Intermediate Polar IGR J19173+0747".ASTROPHYSICAL JOURNAL 998.2(2026).

入库方式： OAI收割

来源：云南天文台

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