热门
ADIABATIC MASS LOSS IN BINARY STARS. II. FROM ZERO-AGE MAIN SEQUENCE TO THE BASE OF THE GIANT BRANCH
文献类型：期刊论文
| 作者 | Ge HW(葛宏伟)1,2 ; Webbink, RF3; Chen XF(陈雪飞)1,2; Han ZW(韩占文)1,2
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2015-10-10 |
| 卷号 | 812期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | binaries: close stars: evolution stars: interiors stars: mass-loss |
| 通讯作者 | Ge, HW (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | In the limit of extremely rapid mass transfer, the response of a donor star in an interacting binary becomes asymptotically one of adiabatic expansion. We survey here adiabatic mass loss from Population I stars (Z = 0.02) of mass 0.10M(circle dot)-100M(circle dot) from the zero-age main sequence to the base of the giant branch, or to central hydrogen exhaustion for lower main sequence stars. The logarithmic derivatives of radius with respect to mass along adiabatic mass-loss sequences translate into critical mass ratios for runaway (dynamical timescale) mass transfer, evaluated here under the assumption of conservative mass transfer. For intermediate- and high-mass stars, dynamical mass transfer is preceded by an extended phase of thermal timescale mass transfer as the star is stripped of most of its envelope mass. The critical mass ratio q(ad) (throughout this paper, we follow the convention of defining the binary mass ratio as q = M-donor/M-accretor) above which this delayed dynamical instability occurs increases with advancing evolutionary age of the donor star, by ever-increasing factors for more massive donors. Most intermediate-or high-mass binaries with nondegenerate accretors probably evolve into contact before manifesting this instability. As they approach the base of the giant branch, however, and begin developing a convective envelope, q(ad) plummets dramatically among intermediate-mass stars, to values of order unity, and a prompt dynamical instability occurs. Among low-mass stars, the prompt instability prevails throughout main sequence evolution, with q(ad) declining with decreasing mass, and asymptotically approaching q(ad) = 2/3, appropriate to a classical isentropic n = 3/2 polytrope. Our calculated qad values agree well with the behavior of time-dependent models by Chen & Han of intermediate-mass stars initiating mass transfer in the Hertzsprung gap. Application of our results to cataclysmic variables, as systems that must be stable against rapid mass transfer, nicely circumscribes the range in q(ad) as a function of the orbital period in which they are found. These results are intended to advance the verisimilitude of population synthesis models of close binary evolution. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ECLIPSING DWARF NOVA ; HUBBLE-SPACE-TELESCOPE ; X-RAY SOURCES ; WHITE-DWARF ; CATACLYSMIC VARIABLES ; SYSTEM PARAMETERS ; U-GEMINORUM ; EM CYGNI ; IP-PEG ; COMPONENT MASSES |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/812/1/40/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000364234700040 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4587]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Yunnan Observatories, The Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Department of Astronomy, University of Illinois, 1002 W. Green St., Urbana, IL 61801, USA |
| 推荐引用方式 GB/T 7714 | Ge HW,Webbink, RF,Chen XF,et al. ADIABATIC MASS LOSS IN BINARY STARS. II. FROM ZERO-AGE MAIN SEQUENCE TO THE BASE OF THE GIANT BRANCH[J]. ASTROPHYSICAL JOURNAL,2015,812(1). |
| APA | Ge HW,Webbink, RF,Chen XF,&Han ZW.(2015).ADIABATIC MASS LOSS IN BINARY STARS. II. FROM ZERO-AGE MAIN SEQUENCE TO THE BASE OF THE GIANT BRANCH.ASTROPHYSICAL JOURNAL,812(1). |
| MLA | Ge HW,et al."ADIABATIC MASS LOSS IN BINARY STARS. II. FROM ZERO-AGE MAIN SEQUENCE TO THE BASE OF THE GIANT BRANCH".ASTROPHYSICAL JOURNAL 812.1(2015). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。