Detection of Transitions between Dwarf Nova Outbursts, Standstills, and IW And-type Cycles
文献类型：期刊论文
| 作者 | Sun, Qi-Bin3; Qian, Sheng-Bang3; Zhu LY(朱俐颖)1,2; Li, Qin-Mei3; Liao WP(廖文萍)1,2; Li, Fu-Xing3; Lin, Wen-Xu3; Li MY(李敏榆)1,2; Li P(李平)1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-08-20 |
| 卷号 | 989期号:2 |
| ISSN号 | 1538-43570004-637X |
| DOI | 10.3847/1538-4357/adf4e9 |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article |
| 英文摘要 | IW And-type objects represent a rare and intriguing subclass of cataclysmic variables that challenge the classical disk instability model. Due to their long timescales, often lasting several months, observed samples are scarce, leaving the physics of state transitions poorly understood. Here, we report the discovery of ASASSN-V J175721.00+152502.1 as a new IW And-type system based on both ground-based and space-based survey data. For the first time, we measure its orbital period and negative superhump (NSH) period as 0.25619(81) days and 0.24107(33) days, respectively. We present detailed observational evidence for transitions between IW And-type cycles, classical standstills, and normal dwarf nova outbursts. Notably, the transition from the IW And-type cycle to a classical standstill is presented in detail for the first time, together with a decrease in the NSH period, which provides evidence for accretion disk expansion. We evaluate theoretical models that could explain the observed light variations and rule out simple scenarios such as mass-transfer bursts or superoutbursts. Although the tilted-disk thermal instability model is the most plausible, it does not fully account for the detailed behavior. We propose that a combination of factors, such as thermal-viscous instabilities, fluctuations in the mass-transfer rate, changes in the disk radius, tilted disk precession, and tidal dissipation involving the secondary star, is likely needed to explain the full range of observed phenomena. |
| 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 | DISK-INSTABILITY MODEL ; QUASI-PERIODIC OSCILLATIONS ; NEGATIVE SUPERHUMPS ; TILTED DISKS ; ACCRETION DISCS ; MASS-TRANSFER ; HS 2325+8205 ; STAR ; SUPEROUTBURSTS ; PRECESSION |
| 资助项目 | MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[GZC20252095]; Postdoctoral Fellowship Program of CPSF[2025M773194]; China Postdoctoral Science Foundation[C615300504124]; Caiyun Postdoctoral Program in Yunnan Province of China[2022YFE0116800]; National Key R&D Program of China[202501AS070055]; National Key R&D Program of China[202503AP140013]; National Key R&D Program of China[202201AT070092]; National Key R&D Program of China[202401AT070143]; Yunnan Fundamental Research Projects[CMS-CSST-2025-A16]; China Manned Space Program[020GJHZ2023030GC]; International Partnerships Program of Chinese Academy of Sciences; CAS Light of West China Program[11933008]; CAS Light of West China Program[12303040]; National Natural Science Foundation of China |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001551773500001 |
| 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[GZC20252095] ; Postdoctoral Fellowship Program of CPSF[2025M773194] ; China Postdoctoral Science Foundation[C615300504124] ; Caiyun Postdoctoral Program in Yunnan Province of China[2022YFE0116800] ; National Key R&D Program of China[202501AS070055, 202503AP140013, 202201AT070092, 202401AT070143] ; Yunnan Fundamental Research Projects[CMS-CSST-2025-A16] ; China Manned Space Program[020GJHZ2023030GC] ; International Partnerships Program of Chinese Academy of Sciences ; CAS Light of West China Program[11933008, 12303040] ; National Natural Science Foundation of China |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28519]  |
| 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.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; 2.University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing, People’s Republic of China 3.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China; qiansb@ynu.edu.cn; |
| 推荐引用方式 GB/T 7714 | Sun, Qi-Bin,Qian, Sheng-Bang,Zhu LY,et al. Detection of Transitions between Dwarf Nova Outbursts, Standstills, and IW And-type Cycles[J]. ASTROPHYSICAL JOURNAL,2025,989(2). |
| APA | Sun, Qi-Bin.,Qian, Sheng-Bang.,朱俐颖.,Li, Qin-Mei.,廖文萍.,...&李平.(2025).Detection of Transitions between Dwarf Nova Outbursts, Standstills, and IW And-type Cycles.ASTROPHYSICAL JOURNAL,989(2). |
| MLA | Sun, Qi-Bin,et al."Detection of Transitions between Dwarf Nova Outbursts, Standstills, and IW And-type Cycles".ASTROPHYSICAL JOURNAL 989.2(2025). |
入库方式： OAI收割
来源：云南天文台
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