Stellar age versus mass of early-type galaxies in the Virgo Cluster
文献类型：期刊论文
| 作者 | Lisker, T1; Han ZW(韩占文)2
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2008-06-20 |
| 卷号 | 680期号:2页码:1042-1048 |
| 关键词 | galaxies : clusters : individual (Virgo) galaxies : dwarf galaxies : elliptical and lenticular,cD galaxies : stellar content subdwarfs |
| ISSN号 | 0004-637X |
| 产权排序 | 第二完成单位 |
| 通讯作者 | Lisker, T (reprint author), Univ Heidelberg, Zentrum Astron, Astron Rech Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany. |
| 英文摘要 | The flux excess of elliptical galaxies in the far-ultraviolet can be reproduced by population synthesis models when accounting for the population of old, hot, helium-burning subdwarf stars. This has been achieved by Han and co-workers through a quantitative model of binary stellar evolution. Here, we compare the resulting evolutionary population synthesis model to the GALEX far-near ultraviolet colors (FUV-NUV) of Virgo Cluster early-type galaxies that were published by Boselli and coworkers. FUV-NUV is reddest at about the dividing luminosity of dwarf and giant galaxies, and becomes increasingly blue for both brighter and fainter luminosities. This behavior can be easily explained by the binary model with a continuous sequence of longer duration and later truncation of star formation at lower galaxy masses. Thus, in contrast to previous conclusions, the GALEX data do not require a dichotomy between the stellar population properties of dwarfs and giants. Their apparently opposite behavior in FUV-NUV occurs naturally when the formation of hot subdwarfs through binary evolution is taken into account. |
| 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] | COLOR-MAGNITUDE RELATION ; DIGITAL SKY SURVEY ; SUBDWARF-B-STARS ; HORIZONTAL-BRANCH STARS ; IA PROGENITOR SURVEY ; EARLY-TYPE DWARFS ; ELLIPTIC GALAXIES ; EVOLUTIONARY SEQUENCES ; RADIATIVE OPACITIES ; SDB STARS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0004-637X/680/2/1042/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000256752400016 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4452]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstrasse 12-14, D-69120 Heidelberg, Germany 2.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Lisker, T,Han ZW. Stellar age versus mass of early-type galaxies in the Virgo Cluster[J]. ASTROPHYSICAL JOURNAL,2008,680(2):1042-1048. |
| APA | Lisker, T,&Han ZW.(2008).Stellar age versus mass of early-type galaxies in the Virgo Cluster.ASTROPHYSICAL JOURNAL,680(2),1042-1048. |
| MLA | Lisker, T,et al."Stellar age versus mass of early-type galaxies in the Virgo Cluster".ASTROPHYSICAL JOURNAL 680.2(2008):1042-1048. |
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。