Photometric and Spectroscopic Studies of Superoutbursts of Three Dwarf Novae Independently Identified by the SVOM/GWAC System in 2018
文献类型：期刊论文
| 作者 | Wang,J.10,11; Li,H. L.10; Xin,L. P.10; Han,X. H.10; Meng,X. M.10; Brink,T. G.9; Cai,H. B.10; Dai,Z. G.8; Filippenko,A. V.9; Hsia,C. -H.7 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2020-01-03 |
| 卷号 | 159期号:2 |
| ISSN号 | 0004-6256 |
| 关键词 | Dwarf novae WZ Sagittae stars Cataclysmic variable stars Observational astronomy Astronomical methods Automatic patrol telescopes |
| DOI | 10.3847/1538-3881/ab5855 |
| 英文摘要 | Abstract We report our photometric and spectroscopic follow-up observations of the superoutbursts of three dwarf novae (DNe; GWAC 180415A, GWAC 181017A, and GWAC 181211A) identified independently by the Ground Wide-angle Cameras system, one of the ground-based instruments of the China–France SVOM mission. Based on a combination of our photometry and that taken from the American Association of Variable Star Observers, our period analysis of the superhumps enables us to determine the mass ratios to be 0.0967–0.1163, 0.1879–0.1883, and 0.0981–0.1173 for GWAC 180415A, GWAC 181017A, and GWAC 181211A, respectively. GWAC 180415A can be firmly identified as a WZ sge-type DNe due to its long duration (～2 weeks) multiple rebrightenings with amplitudes of 3–4 mag, the early superhump associated with a double-wave modulation and the low-mass ratio. The inferred low-mass ratio and location in the diagram suggest that GWAC 181211A is a WZ sge-type DNe candidate. The measured Balmer decrements suggest the Balmer line emission is produced from an optical thick region in GWAC 180415A and GWAC 181017A, and from an optically thin region in GWAC 181211A. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-6256-159-2-AB5855 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/35651]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210034, People’s Republic of China 2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, People’s Republic of China 5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China 6.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China 7.State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Taipa, Macau, 999078, People’s Republic of China 8.School of Astronomy and Space Science, Nanjing University, Nanjing, 210000, People’s Republic of China 9.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA 10.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; lhl@nao.cas.cn |
| 推荐引用方式 GB/T 7714 | Wang,J.,Li,H. L.,Xin,L. P.,et al. Photometric and Spectroscopic Studies of Superoutbursts of Three Dwarf Novae Independently Identified by the SVOM/GWAC System in 2018[J]. The Astronomical Journal,2020,159(2). |
| APA | Wang,J..,Li,H. L..,Xin,L. P..,Han,X. H..,Meng,X. M..,...&Wei,J. Y..(2020).Photometric and Spectroscopic Studies of Superoutbursts of Three Dwarf Novae Independently Identified by the SVOM/GWAC System in 2018.The Astronomical Journal,159(2). |
| MLA | Wang,J.,et al."Photometric and Spectroscopic Studies of Superoutbursts of Three Dwarf Novae Independently Identified by the SVOM/GWAC System in 2018".The Astronomical Journal 159.2(2020). |
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