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Classifying IGR J20084+3221 as an intermediate polar with XMM-Newton and NuSTAR

文献类型：期刊论文

作者Yan, Fang-Zhou1; Qian, Sheng-Bang1; Qian, Ming-Yu2; Liao WP(廖文萍)3,4
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2026-06
卷号549期号:1
关键词novae, cataclysmic variables X-rays: binaries
ISSN号0035-8711
DOI10.1093/mnras/stag647
产权排序第3完成单位
文献子类Article
英文摘要This paper reports the results of a periodic search and spectral analysis of the X-ray source IGR J20084 + 3221 in the Milky Way, based on observations from XMM-Newton and NuSTAR. The source was previously considered a high-mass X-ray binary (HMXB) or magnetic cataclysmic variable (MCV). Using the Z(1)(2) test method, we detected significant periodic signals: 636 . 7 +/- 0 . 9 s from the XMM-Newton data and 635.5 +/- 0.4 s from the NuSTAR data, which are consistent within the margin of error. Spectral fitting revealed a plasma temperature of kT = 31 +/- 4 keV, along with the detection of Fe K alpha fluorescence lines and Fe xxv and Fe xxvi emission lines. The inclusion of a partial covering absorption model significantly improved the spectral fitting. The pulse fraction was observed to decrease with increasing energy. These characteristics are consistent with those of an intermediate polar (IP). Therefore, we identify IGR J20084 + 3221 as an intermediate polar, with the detected period corresponding to the spin period of the white dwarf. Using multi-temperature X-ray emission model developed for intermediate polars (ipolar.fits), we estimate the mass of the white dwarf to be 1 . 181 +/- 0 . 083 M-circle dot.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词X-RAY ; WHITE-DWARF ; MAGNETIC CV ; MASS ; SPIN
资助项目Chinese Academy of Sciences[020GJHZ2023030GC]; China postdoctoral Science Foundation[GZC20252095]; China postdoctoral Science Foundation[2025M773194]; Caiyun Post-doctoral Programme in Yunnan Province of China[C615300504124]; National Natural Science Foundation of China[12573038]; National Natural Science Foundation of China[12503040]; Science Foundation of Yunnan Province[202503AP140013]; Science Foundation of Yunnan Province[202501AS070055]; Science Foundation of Yunnan Province[202401AS070046]; The 2022 Chinese Academy of Sciences 'Light of West China' Program
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001768683500001
出版者OXFORD UNIV PRESS
资助机构Chinese Academy of Sciences[020GJHZ2023030GC] ; China postdoctoral Science Foundation[GZC20252095, 2025M773194] ; Caiyun Post-doctoral Programme in Yunnan Province of China[C615300504124] ; National Natural Science Foundation of China[12573038, 12503040] ; Science Foundation of Yunnan Province[202503AP140013, 202501AS070055, 202401AS070046] ; The 2022 Chinese Academy of Sciences 'Light of West China' Program
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/29225]  
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, China;
2.School of Electrical Engineering and Telecommunications, University of New South Wales, High St, Kensington, NSW 2052, Sydney, Australia;
3.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, China;
4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing 101408, China
推荐引用方式
GB/T 7714		 Yan, Fang-Zhou,Qian, Sheng-Bang,Qian, Ming-Yu,et al. Classifying IGR J20084+3221 as an intermediate polar with XMM-Newton and NuSTAR[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2026,549(1).
APA Yan, Fang-Zhou,Qian, Sheng-Bang,Qian, Ming-Yu,&廖文萍.(2026).Classifying IGR J20084+3221 as an intermediate polar with XMM-Newton and NuSTAR.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,549(1).
MLA Yan, Fang-Zhou,et al."Classifying IGR J20084+3221 as an intermediate polar with XMM-Newton and NuSTAR".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 549.1(2026).

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