Full evolution of low-mass white dwarfs with helium and oxygen cores | |
Panei, JA1,2; Althaus, LG1,2; Chen XF(陈雪飞)3; Han ZW(韩占文)3 | |
发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
2007-12-01 | |
卷号 | 382期号:2页码:779-792 |
DOI | 10.1111/j.1365-2966.2007.12400.x |
产权排序 | 第3完成单位 |
收录类别 | SCI ; EI |
关键词 | Stars : Evolution Stars : Interiors White Dwarfs |
摘要 | We study the full evolution of low-mass white dwarfs with helium and oxygen cores. We revisit the age dichotomy observed in many white dwarf companions to millisecond pulsar on the basis of white dwarf configurations derived from binary evolution computations. We evolve 11 dwarf sequences for helium cores with final masses of 0.1604, 0.1869, 0.2026, 0.2495, 0.3056, 0.3333, 0.3515, 0.3844, 0.3986, 0.4160 and 0.4481 M.. In addition, we compute the evolution of five sequences for oxygen cores with final masses of 0.3515, 0.3844, 0.3986, 0.4160 and 0.4481 M.. A metallicity of Z = 0.02 is assumed. Gravitational settling, chemical and thermal diffusion are accounted for during the white dwarf regime. Our study reinforces the result that diffusion processes are a key ingredient in explaining the observed age and envelope dichotomy in low-mass helium-core white dwarfs, a conclusion we arrived at earlier on the basis of a simplified treatment for the binary evolution of progenitor stars. We determine the mass threshold where the age dichotomy occurs. For the oxygen white dwarf sequences, we report the occurrence of diffusion-induced, hydrogen-shell flashes, which, as in the case of their helium counterparts, strongly influence the late stages of white dwarf cooling. Finally, we present our results as a set of white dwarf mass-radius relations for helium and oxygen cores. |
语种 | 英语 |
学科领域 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
学科门类 | 理学 ; 理学::天文学 |
文章类型 | Article |
出版者 | Oxford University Press |
ISSN | 0035-8711 |
URL | 查看原文 |
WOS记录号 | WOS:000251205400023 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | CLOSE BINARY EVOLUTION ; NEUTRINO-PAIR BREMSSTRAHLUNG ; CRYSTALLINE LATTICE PHASE ; PULSAR PSR J1012+5307 ; M-CIRCLE-DOT ; THERMAL-CONDUCTIVITIES ; PULSATIONAL PROPERTIES ; DEGENERATE ELECTRONS ; STELLAR INTERIORS ; OPTICAL-DETECTION |
EI入藏号 | 20221411886339 |
EI主题词 | White dwarfs |
EI分类号 | 657.2 Extraterrestrial Physics and Stellar Phenomena - 804 Chemical Products Generally |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4435 |
专题 | 大样本恒星演化研究组 |
通讯作者 | Panei, JA |
作者单位 | 1.Facultad de Ciencias Astronómicas y Geofísicas, UNLP, Paseo del Bosque S/N, La Plata B1900FWA, Argentina 2.Instituto de Astrofísica La Plata, IALP, CONICET-UNLP 3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China |
推荐引用方式 GB/T 7714 | Panei, JA,Althaus, LG,Chen XF,et al. Full evolution of low-mass white dwarfs with helium and oxygen cores[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,382(2):779-792. |
APA | Panei, JA,Althaus, LG,Chen XF,&Han ZW.(2007).Full evolution of low-mass white dwarfs with helium and oxygen cores.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,382(2),779-792. |
MLA | Panei, JA,et al."Full evolution of low-mass white dwarfs with helium and oxygen cores".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 382.2(2007):779-792. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Full evolution of lo(777KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
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。
修改评论