| Photometric Analysis of the Cataclysmic Variable Star LT Eri | |
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
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| 发表期刊 | ASTRONOMICAL JOURNAL
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| 2025-02-03 | |
| 卷号 | 169期号:2 |
| DOI | 10.3847/1538-3881/ad9dd2 |
| 产权排序 | 第3完成单位 |
| 收录类别 | SCI |
| 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. |
| 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 |
| 项目资助者 | 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 |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 恒星与银河系 |
| 文章类型 | Article |
| 出版者 | IOP Publishing Ltd |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 0004-6256 |
| URL | 查看原文 |
| WOS记录号 | WOS:001395520500001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | QUASI-PERIODIC OSCILLATIONS ; DIGITAL SKY SURVEY ; DWARF NOVAE ; NEGATIVE SUPERHUMPS ; INSTABILITY MODEL ; ACCRETION MODEL ; TILTED DISKS ; HS 2325+8205 ; OUTBURSTS ; SIMULATIONS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/27998 |
| 专题 | 双星与变星研究组 |
| 作者单位 | 1.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People's Republic of China; [email protected]; 2.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China; 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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| Photometric Analysis（1819KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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