On the Orbital Period Changes of Two Possible Progenitors of Type Ia Supernovae
文献类型:会议论文
作者 | Shi G(时光)1,2,3; Qian SB(钱声帮)1,2,3 |
出版日期 | 2014 |
会议日期 | 2013-05-27 |
会议地点 | Sejong Univ, Seoul, SOUTH KOREA |
卷号 | 482 |
页码 | 207-208 |
英文摘要 | In the canonical theory, Type Ia supernovae (SNe Ia) originates from the white dwarf experiencing mass accretion from its companion and nuclear burning, which explodes when the mass reaches the Chandrasekhar mass limit. However, the progenitors of SNe Ia and their physical nature are still unclear. In this work, new CCD photometric observations on V617 Sgr and WX Cen are carried out in order to detect the orbital period change and their secular evolution. For V617 Sgr and WX Cen, the rates of orbital period changes were calculated to be Ṗ = +2.14 × 10-7 day/year and Ṗ = -5.15 × 10-7 day/year. The corresponding timescales of the period changes are ˜ 0.97 × 106 year and ˜ 0.81 × 106 year, respectively. Large variations of orbital periods plausibly indicate the existence of high mass transfer. They are important examples in understanding the mass transfer mechanism in the supersoft X-ray sources. Accordingly, the white dwarfs may evolve into SNe Ia within a million years in the Galaxy. |
源文献作者 | Lee, HW; Leung, KC; Kang, YW |
产权排序 | 第1完成单位 |
资助机构 | N/A |
会议录 | Astronomical Society of the Pacific (ASP) Conference Series - TENTH PACIFIC RIM CONFERENCE ON STELLAR ASTROPHYSICS |
会议录出版者 | ASTRONOMICAL SOC PACIFIC |
文献子类 | Proceedings Paper |
学科主题 | 天文学 ; 天体物理学 ; 恒星与银河系 |
会议录出版地 | 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA |
语种 | 英语 |
URL标识 | 查看原文 |
WOS研究方向 | Astronomy & Astrophysics |
ISBN号 | 978-1-58381-849-7; 978-1-58381-848-0 |
WOS记录号 | WOS:000374279800036 |
WOS关键词 | Binaries ; Stars |
源URL | [http://ir.ynao.ac.cn/handle/114a53/9640] |
专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Shi G(时光) |
作者单位 | 1.Yunnan Astronomical Observatory Chinese Academy of Science, P. O. Box 110, 650011 Kunming, China; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences 3.University of the Chinese Academy of Sciences, Beijing 100049, China |
推荐引用方式 GB/T 7714 | Shi G,Qian SB. On the Orbital Period Changes of Two Possible Progenitors of Type Ia Supernovae[C]. 见:. Sejong Univ, Seoul, SOUTH KOREA. 2013-05-27. |
入库方式: OAI收割
来源:云南天文台
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