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On the Orbital Period Changes of Two Possible Progenitors of Type Ia Supernovae
Shi G(时光)1,2,3; Qian SB(钱声帮)1,2,3
会议录名称Astronomical Society of the Pacific (ASP) Conference Series - TENTH PACIFIC RIM CONFERENCE ON STELLAR ASTROPHYSICS
2014
卷号482
页码207-208
会议录编者/会议主办者Lee, HW; Leung, KC; Kang, YW
产权排序第1完成单位
收录类别CPCI
会议名称10th Pacific Rim Conference on Stellar Astrophysics
会议日期2013-05-27
会议地点Sejong Univ, Seoul, SOUTH KOREA
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. 

项目资助者N/A
语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
文章类型Proceedings Paper
出版者ASTRONOMICAL SOC PACIFIC
出版地390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
ISBN号978-1-58381-849-7; 978-1-58381-848-0
URL查看原文
归档日期2014-08-25
WOS记录号WOS:000374279800036
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Binaries ; Stars
引用统计
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9640
专题双星与变星研究组
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
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Shi G,Qian SB. On the Orbital Period Changes of Two Possible Progenitors of Type Ia Supernovae[C]//Lee, HW; Leung, KC; Kang, YW. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2014:207-208.
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