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Discovery and characterization of ZTF J0112+5827: An 80.9-minute polar with strong cyclotron features

文献类型：期刊论文

作者Lin, Jiamao3,5; Ren, Liangliang6; Li, Chengyuan3,5; Nancy, Elias-Rosa11,12; Cang, Tianqi2; Ge HW(葛宏伟)8,10; Thomas Tam, Pak-Hin3,5; Huang, Wenjun3,5; Li, Yilong3,5; Wang, Xiaofeng4,9
刊名Astronomy and Astrophysics
出版日期2025-02-07
卷号694
关键词binaries: close binaries: spectroscopic stars: magnetic field novae cataclysmic variables white dwarfs
ISSN号0004-6361
DOI10.1051/0004-6361/202452177
产权排序第7完成单位
文献子类Article
英文摘要Context. A new X-ray Cataclysmic variable (CV) candidate exhibits distinct light-curve characteristics in the ZTF's g, r, and i bands. The paper includes the optical identification and multiwavelength analysis of this CV candidate. Aims. This work aims to determine if a previously identified CV candidate, ZTF J0112+5827, is a polar system by examining its X-ray and cyclotron radiation characteristics. Methods. We characterized the X-ray emission of ZTF J0112+5827 using the ROSAT observations. The gri-band optical light curves were obtained from the Zwicky Transient Facility. After two nights of time-domain spectroscopic observations with the Palomar 200-inch telescope, we mapped the accretion structures using Doppler tomography. Results. ZTF J0112+5827 exhibits an orbital period of 80.9 minutes, determined from the ZTF light curves, and an average X-ray flux of (68.4 ± 15.7)× 10-14 erg s-1 cm-2 in the 0.1a-2.4 keV range. It shows an ellipsoidal-like variability curve in the g band, with two prominent humps around phases of ∼0.0 and ∼0.7 in the i and r bands. In the spectra corresponding to these phases, a redward-increasing power-law continuum appears, which is accompanied by prominent features of cyclotron emission humps. Emission lines of He II and Balmer series were observed. The magnetic field strength of ZTF J0112+5827 was determined from the cyclotron harmonics. Its tomography map revealed the presence of accretion streams, but there was no evidence of an accretion disk structure. The line-of-sight velocity of the Balmer emission was measured at about 500 km s-1, the majority of which was contributed by accretion streams and accretion spots. Our result confirms that ZTF J0112+5827 is a polar system. It contains a magnetic white dwarf with a magnetic field strength of 38.7-1.1+1.3 MG. © The Authors 2025.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词CATACLYSMIC VARIABLES ; ECLIPSING POLAR ; SKY SURVEY ; ABSORPTION ; ACCRETION ; EMISSION ; CATALOG ; EVOLUTION ; BINARIES ; DWARFS
资助项目National Key R&D Program of China[2020YFC2201400]; National Natural Science Foundation of China (NSFC)[12233013]; National Natural Science Foundation of China (NSFC)[12288102]; National Natural Science Foundation of China (NSFC)[12273002]; National Natural Science Foundation of China (NSFC)[12173081]; PRIN-INAF; National Key R&D Program of China[2021YFA1600403]; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (CAS)[ZDBS-LY-7005]; NSFC[12273122]; China Manned Space Project
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001416104000023
出版者EDP SCIENCES S A
资助机构National Key R&D Program of China[2020YFC2201400] ; National Natural Science Foundation of China (NSFC)[12233013, 12288102, 12273002, 12173081] ; PRIN-INAF ; National Key R&D Program of China[2021YFA1600403] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (CAS)[ZDBS-LY-7005] ; NSFC[12273122] ; China Manned Space Project
源URL[http://ir.ynao.ac.cn/handle/114a53/28170]  
专题云南天文台_大样本恒星演化研究组
作者单位1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China
2.School of Physics and Astronomy, Beijing Normal University, Beijing, 100875, China;
3.School of Physics and Astronomy, Sun Yat-sen University, Zhuhai, 519082, China;
4.Beijing Planetarium, Beijing Academy of Science and Technology, Beijing, 100044, China;
5.CSST Science Center for the Guangdong-Hongkong-Macau Greater Bay Area, Sun Yat-sen University, Zhuhai, 519082, China;
6.School of Electrical and Electronic Engineering, Anhui Science and Technology University, Anhui, Bengbu, 233030, China;
7.University of Chinese Academy of Sciences, Beijing, 100049, China;
8.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China;
9.Physics Department and Tsinghua, Center for Astrophysics, Tsinghua University, Beijing, 100084, China;
10.International Center of Supernovae, Yunnan Key Laboratory, Kunming, 650216, China;
推荐引用方式
GB/T 7714		 Lin, Jiamao,Ren, Liangliang,Li, Chengyuan,et al. Discovery and characterization of ZTF J0112+5827: An 80.9-minute polar with strong cyclotron features[J]. Astronomy and Astrophysics,2025,694.
APA Lin, Jiamao.,Ren, Liangliang.,Li, Chengyuan.,Nancy, Elias-Rosa.,Cang, Tianqi.,...&Ma, Bo.(2025).Discovery and characterization of ZTF J0112+5827: An 80.9-minute polar with strong cyclotron features.Astronomy and Astrophysics,694.
MLA Lin, Jiamao,et al."Discovery and characterization of ZTF J0112+5827: An 80.9-minute polar with strong cyclotron features".Astronomy and Astrophysics 694(2025).

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