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Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1

文献类型：期刊论文

作者Hou, Wen5; Lin, Jia-Mao1; Luo, A-Li2,3,5; Dai ZB(戴智斌)4; Dong, Yi-Qiao5; Ma, Shu-Guo5
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2026-02-01
卷号282期号:2
ISSN号0067-0049
DOI10.3847/1538-4365/ae2024
产权排序第5完成单位
文献子类Article
英文摘要We present a systematic search for cataclysmic variables (CVs) using spectroscopic data from Data Release 1 of the Dark Energy Spectroscopic Instrument. Applying the Bagging-TopPush algorithm, we identified 433 CV candidates and related objects, of which 412 are confirmed CVs including 76 new systems. Subtypes were assigned through a combination of DESI spectra, Gaia data, and light curves from time-domain surveys, revealing populations of dwarf novae, novalike variables, magnetic CVs, and AM CVn binaries. Orbital periods were constrained from eclipsing light curves and DESI radial velocity curves for 14 systems. For 31 WZ Sge-type dwarf novae, we estimated white dwarf masses and radii by combining Galaxy Evolution Explorer ultraviolet photometry with DESI optical spectra, obtaining average values of 0.82 M circle dot for mass and 13,452 K for effective temperature. We also calculated the strength of the magnetic field for three polars based on the cyclotron features. Furthermore, we derived subtype-dependent space densities and found values consistent, within uncertainties, with those inferred from Sloan Digital Sky Survey, Gaia, and other survey data, though remaining lower than theoretical predictions by 1-2 orders of magnitude. Besides, we highlight several notable objects, including newly identified AM CVn systems, eclipsing systems in the period gap, donor-dominated binaries, and other unusual systems of particular interest for follow-up observations.
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X-RAY BINARIES ; AM CVN STARS ; CATALOG ; GAIA ; SPECTRA
资助项目MOST divided by National Natural Science Foundation of China (NSFC)[12273075]; MOST divided by National Natural Science Foundation of China (NSFC)[12273078]; MOST divided by National Natural Science Foundation of China (NSFC)[12411530071]; MOST divided by National Natural Science Foundation of China (NSFC)[12233013]; The Royal Society[IEC\NSFC\233140]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001660821000001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)[12273075, 12273078, 12411530071, 12233013] ; The Royal Society[IEC\NSFC\233140]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28857]  
专题云南天文台_大样本恒星演化研究组
通讯作者Hou, Wen
作者单位1.School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, People’s Republic of China;
2.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China;
3.School of Information Management & Institute for Astronomical Science, Dezhou University, Dezhou 253023, People’s Republic of China;
4.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, People’s Republic of China
5.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; whou@bao.ac.cn, lal@bao.ac.cn;
推荐引用方式
GB/T 7714		 Hou, Wen,Lin, Jia-Mao,Luo, A-Li,et al. Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2026,282(2).
APA Hou, Wen,Lin, Jia-Mao,Luo, A-Li,戴智斌,Dong, Yi-Qiao,&Ma, Shu-Guo.(2026).Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,282(2).
MLA Hou, Wen,et al."Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 282.2(2026).

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来源：云南天文台

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