Confirmation and revision on the orbital period change of the possible type la supernova progenitor V617 Sagittarii
文献类型：期刊论文
| 作者 | Shi G(时光)1,2,3 ; Qian SB(钱声帮)1,2,3; Lajus, EF4,5
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 出版日期 | 2014-02 |
| 卷号 | 66期号:1页码:1-6 |
| 关键词 | binaries: close binaries: eclipsing stars: evolution stars: individual (V617 Sgr) stars: winds, outflows |
| ISSN号 | 0004-6264 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Shi, G (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | This work reports new photometric results of eclipsing cataclysmic variable V617 Sagittarii (V617 Sgr). We analyzed the orbital period change of V617 Sgr by employing three new (since 2010) CCD eclipse timings along with all the available data from the literature. It was found that the orbital period of V617 Sgr undergoes an obvious long-term increase, which confirms the result revealed by Steiner et al. (2006). The rate of orbital period increase was calculated to be <(P)over dot> = +2.14(0.05) x 10(-7) d yr(-1). This suggests the lifetime of the secondary star will end in a timescale of 0.97 x 10(6) yr faster than that predicted previously. In particular, a cyclic variation with a period of 4.5 yr and an amplitude of 2.3 min may appear in the O - C diagram. Dominated by the wind-accretion mechanism, high mass transfer from the low mass secondary to the white dwarf is expected to continue in the V Sge-type star V617 Sgr during its long-term evolution. The mass transfer rate vertical bar<(M)over dot>(tr)vertical bar was estimated to be in the range of about 2.2 x 10(-7) to 5.2 x 10(-7) M-circle dot yr(-1). Accordingly, the already massive (>= 1.2 M-circle dot) white dwarf primary will process stable nuclear burning, accrete a fraction of the mass from its companion to reach the standard Chandrasekhar mass limit (similar or equal to 1.38 M-circle dot), and ultimately produce a type la supernova (SN la) within about 4-8 x 10(5) yr or earlier. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | WIND-DRIVEN EVOLUTION ; ASSISTED STELLAR SUICIDE ; X-RAY SOURCES ; V-SAGITTAE ; MAGNETIC BRAKING ; IA SUPERNOVA ; DWARF ; BINARIES ; STARS |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/66/1/8 |
| 语种 | 英语 |
| WOS记录号 | WOS:000339426900009 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5905]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 3.University of the Chinese Academy of Sciences, Beijing 100049, China 4.Facultad de Ciencias Astrónmicas y Geofisicas, Universidad Nacional de La Plata Paseo del Bosque s/n, 1900, La Plata, Pcia. Bs. As., Argentina 5.Instituto de Astrofisica de La Plata (CCT La plata—CONICET/UNLP), Paseo del Bosque s/n - La Plata, Argentina |
| 推荐引用方式 GB/T 7714 | Shi G,Qian SB,Lajus, EF. Confirmation and revision on the orbital period change of the possible type la supernova progenitor V617 Sagittarii[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2014,66(1):1-6. |
| APA | Shi G,Qian SB,&Lajus, EF.(2014).Confirmation and revision on the orbital period change of the possible type la supernova progenitor V617 Sagittarii.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,66(1),1-6. |
| MLA | Shi G,et al."Confirmation and revision on the orbital period change of the possible type la supernova progenitor V617 Sagittarii".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 66.1(2014):1-6. |
入库方式： OAI收割
来源：云南天文台
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