YNAO OpenIR  > 大样本恒星演化研究组
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
DOI10.1111/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
ISSN0035-8711
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
被引频次:128[WOS]   [WOS记录]     [WOS相关记录]
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
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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.
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