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Photometric Analysis of the Cataclysmic Variable Star LT Eri

文献类型：期刊论文

作者Sun, Qi-Bin1,2; Qian, Sheng-Bang1,2; Zhu LY(朱俐颖)3,4; Li, Qin-Mei1,2,5; Li FX(李福兴)3; Li MY(李敏榆)3,4; Li P(李平)3,4
刊名ASTRONOMICAL JOURNAL
出版日期2025-02-03
卷号169期号:2
ISSN号0004-6256
DOI10.3847/1538-3881/ad9dd2
产权排序第3完成单位
文献子类Article
英文摘要LT Eri is a long-period eclipsing cataclysmic variable star (CV). This study investigates its outbursts, negative superhumps (NSHs), tilted-disk precession, eclipse-depth variations, and observed minus calculated (O - C) behavior, using photometric data from the Transiting Exoplanet Survey Satellite (TESS), the Zwicky Transient Facility, the All-Sky Automated Survey for Supernovae, and the American Association of Variable Star Observers. Our analysis reveals an outburst period of 14.7(31) days, with variable periods ranging from 11.62(4) to 22.15(13) days. Both long and short outbursts were detected, lasting approximately 18 and 10 days, respectively. Analysis of the TESS photometry shows that the NSH period is updated to 0.16265161(7) days, persists during the outburst, and its amplitude is correlated with the outburst phase. A suspected signal of tilted-disk precession with a period of 3.5781(6) days is also detected. Additionally, the eclipse depth shows a periodic variation of 3.6270(9) days, closely matching the tilted-disk precession period; however, no biperiodic variation is found, as seen in the dwarf nova HS 2325+8205, suggesting that this phenomenon is not universal. An O - C analysis reveals a weak oscillation with a period of 3.5772(6) days. Our superposition of sine curves consistent with the NSH period and amplitude, along with mean eclipse curves, produces periodic O - C variations with a period of 3.6666(2) days. This indicates that the observed periodic variations in O - C, often around the disk precession period in CVs, may result from the beat between the NSHs and the eclipse rather than actual variations in the accretion disk.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词QUASI-PERIODIC OSCILLATIONS ; DIGITAL SKY SURVEY ; DWARF NOVAE ; NEGATIVE SUPERHUMPS ; INSTABILITY MODEL ; ACCRETION MODEL ; TILTED DISKS ; HS 2325+8205 ; OUTBURSTS ; SIMULATIONS
资助项目MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2022YFE0116800]; National Key R&D Program of China[11933008]; National Key R&D Program of China[12103084]; National Key R&D Program of China[12303040]; National Natural Science Foundation of China; All-Sky Automated Survey for Supernovae
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001395520500001
出版者IOP Publishing Ltd
资助机构MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2022YFE0116800] ; National Key R&D Program of China[11933008, 12103084, 12303040] ; National Natural Science Foundation of China ; All-Sky Automated Survey for Supernovae
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27998]  
专题云南天文台_双星与变星研究组
作者单位1.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China;
2.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People's Republic of China; qiansb@ynu.edu.cn;
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
4.University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing, People's Republic of China;
5.Department of Physics, College of Physics, Guizhou University, Guiyang 550025, People's Republic of China
推荐引用方式
GB/T 7714		 Sun, Qi-Bin,Qian, Sheng-Bang,Zhu LY,et al. Photometric Analysis of the Cataclysmic Variable Star LT Eri[J]. ASTRONOMICAL JOURNAL,2025,169(2).
APA Sun, Qi-Bin.,Qian, Sheng-Bang.,朱俐颖.,Li, Qin-Mei.,李福兴.,...&李平.(2025).Photometric Analysis of the Cataclysmic Variable Star LT Eri.ASTRONOMICAL JOURNAL,169(2).
MLA Sun, Qi-Bin,et al."Photometric Analysis of the Cataclysmic Variable Star LT Eri".ASTRONOMICAL JOURNAL 169.2(2025).

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来源：云南天文台

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