Evolutionary and pulsational properties of low-mass white dwarf stars with oxygen cores resulting from close binary evolution
文献类型：期刊论文
| 作者 | Althaus, LG1; Corsico, AH1; Gautshy, A2; Han ZW(韩占文)3 ; Serenelli, AM1; Panei, JA1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2004 |
| 卷号 | 347期号:1页码:125-136 |
| 关键词 | binaries : general stars : evolution stars : interiors stars : oscillations white dwarfs |
| ISSN号 | 0035-8711 |
| 产权排序 | 第三完成单位 |
| 通讯作者 | Althaus, LG (reprint author), Natl Univ La Plata, Fac Ciencias Astron & Geofis, Paseo Bosque S-N, RA-1900 La Plata, Argentina. |
| 英文摘要 | The present work is designed to explore the evolutionary and pulsational properties of low-mass white dwarfs with carbon/oxygen cores. In particular, we follow the evolution of a 0.33-M. white dwarf remnant in a self-consistent way with the predictions of nuclear burning, element diffusion and the history of the white dwarf progenitor. Attention is focused on the occurrence of hydrogen shell flashes induced by diffusion processes during cooling phases. The evolutionary stages prior to the white dwarf formation are also fully accounted for by computing the conservative binary evolution of an initially 2.5-M. Population I star with a 1.25-M. companion, and with period P-i = 3d. Evolution is followed down to the domain of the ZZ Ceti stars on the white dwarf cooling branch. We find that chemical diffusion induces the occurrence of an additional hydrogen thermonuclear flash, which leads to stellar models with thin hydrogen envelopes. As a result, a fast cooling is encountered at advanced stages of evolution. In addition, we explore the adiabatic pulsational properties of the resulting white dwarf models. As compared with their helium-core counterparts, low-mass oxygen-core white dwarfs are characterized by a pulsational spectrum much more featured, an aspect which could eventually be used for distinguishing both types of stars, if low-mass white dwarfs were in fact found to pulsate as ZZ Ceti-type variables. Finally, we perform a non-adiabatic pulsational analysis on the resulting carbon/oxygen low-mass white dwarf models. |
| 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] | DOUBLE-DEGENERATE ; ADIABATIC PROPERTIES ; COOLING CURVES ; HELIUM ; MODELS ; COMPANION ; DIFFUSION ; HYDROGEN ; PERIOD ; TEMPERATURE |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/347/1/125 |
| 语种 | 英语 |
| WOS记录号 | WOS:000187257000014 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4412]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.Facultad de Ciencias Astronómicas y Geofísicas de la Universidad Nacional de La Plata and Instituto de Astrofísica de La Plata (CONICET-UNLP), Paseo del Bosque S/N, (1900) La Plata, Argentina 2.Froburgstr. 43, 4052 Basel, Switzerland 3.National Astronomical Observatories/Yunnan Observatory, The Chinese Academy of Science, PO Box 110, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Althaus, LG,Corsico, AH,Gautshy, A,et al. Evolutionary and pulsational properties of low-mass white dwarf stars with oxygen cores resulting from close binary evolution[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2004,347(1):125-136. |
| APA | Althaus, LG,Corsico, AH,Gautshy, A,Han ZW,Serenelli, AM,&Panei, JA.(2004).Evolutionary and pulsational properties of low-mass white dwarf stars with oxygen cores resulting from close binary evolution.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,347(1),125-136. |
| MLA | Althaus, LG,et al."Evolutionary and pulsational properties of low-mass white dwarf stars with oxygen cores resulting from close binary evolution".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 347.1(2004):125-136. |
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来源：云南天文台
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