The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1 M-circle dot
文献类型：期刊论文
| 作者 | Rebassa-Mansergas, A1; Rybicka, M2; Liu, XW1,3; Han ZW(韩占文)4 ; Garcia-Berro, E5,6
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2015-09-11 |
| 卷号 | 452期号:2页码:1637-1642 |
| 关键词 | stars: luminosity function, mass function white dwarfs |
| ISSN号 | 0035-8711 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Rebassa-Mansergas, A (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China. |
| 英文摘要 | The mass function of hydrogen-rich atmosphere white dwarfs has been frequently found to reveal a distinctive high-mass excess near 1 M-circle dot. However, a significant excess of massive white dwarfs has not been detected in the mass function of the largest white dwarf catalogue to date from the Sloan Digital Sky Survey (SDSS). Hence, whether a high-mass excess exists or not has remained an open question. In this work, we build the mass function of the latest catalogue of data release ten SDSS hydrogen-rich white dwarfs, including the cool and faint population (i.e. effective temperatures 6000 less than or similar to T-eff less than or similar to 12 000 K, equivalent to 12 mag less than or similar to M-bol less than or similar to 13 mag). We show that the high-mass excess is clearly present in our mass function, and that it disappears only if the hottest (brightest) white dwarfs (those with T-eff greater than or similar to 12 000 K, M-bol less than or similar to 12 mag) are considered. This naturally explains why previous SDSS mass functions failed at detecting a significant excess of high-mass white dwarfs. Thus, our results provide additional and robust observational evidence for the existence of a distinctive high-mass excess near 1 M-circle dot. We investigate possible origins of this feature and argue that the most plausible scenario that may lead to an observed excess of massive white dwarfs is the merger of the degenerate core of a giant star with a main-sequence or a white dwarf companion during or shortly after a common envelope event. |
| 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] | DIGITAL-SKY-SURVEY ; CORE-DEGENERATE SCENARIO ; 3D MODEL ATMOSPHERES ; LUMINOSITY FUNCTION ; IA SUPERNOVAE ; POPULATION SYNTHESIS ; DATA RELEASE ; COMMON-ENVELOPE ; BINARY STARS ; MERGER |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/452/2/1637 |
| 语种 | 英语 |
| WOS记录号 | WOS:000360851900044 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4590]  |
| 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.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China 2.Nicolaus Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warszawa, Poland 3.Department of Astronomy, Peking University, Beijing 100871, People's Republic of China 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, People's Republic of China 5.Departament de Física Aplicada, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain 6.Institute for Space Studies of Catalonia, c/Gran Capità 2–4, Edif. Nexus 201, E-08034 Barcelona, Spain |
| 推荐引用方式 GB/T 7714 | Rebassa-Mansergas, A,Rybicka, M,Liu, XW,et al. The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1 M-circle dot[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(2):1637-1642. |
| APA | Rebassa-Mansergas, A,Rybicka, M,Liu, XW,Han ZW,&Garcia-Berro, E.(2015).The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1 M-circle dot.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(2),1637-1642. |
| MLA | Rebassa-Mansergas, A,et al."The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1 M-circle dot".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.2(2015):1637-1642. |
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来源：云南天文台
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