Evolution of M81 with exponentially decreasing star formation rate of PEGASE
文献类型：期刊论文
| 作者 | Li, JL; Zhou, X ; Ma, J; Chen, JS
|
| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2004-04-01 |
| 卷号 | 4期号:2页码:143-152 |
| 关键词 | galaxies : individual (M81) galaxies : evolution galaxies : star general |
| 英文摘要 | Based on the large field multicolor observations of Beijing-Arizona-Taiwan-Connecticut (BATC) program, we obtain the spectral energy distribution (SED) for individual regions of M81. We study the structure and evolution of M81 with an evolutionary population synthesis (EPS) model, PEGASE. We find that the exponentially deceasing star formation rate (SFR) with star formation scale 3 Gyr (hereafter Exp, T = 3 Gyr) gives the best agreement between the model predictions and the observed SEDs. We then obtain the structure, age distribution and evolutionary history of M81. There is a clear age gradient between the central and outer regions. The populations in the central regions are older than 7 Gyr, those in the outer regions are younger, at about 4.5 Gyr. The youngest components in the spiral arms have ages of about 2.5 Gyr or less. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000221037700005 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8108]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, JL,Zhou, X,Ma, J,et al. Evolution of M81 with exponentially decreasing star formation rate of PEGASE[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2004,4(2):143-152. |
| APA | Li, JL,Zhou, X,Ma, J,&Chen, JS.(2004).Evolution of M81 with exponentially decreasing star formation rate of PEGASE.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,4(2),143-152. |
| MLA | Li, JL,et al."Evolution of M81 with exponentially decreasing star formation rate of PEGASE".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 4.2(2004):143-152. |
入库方式： OAI收割
来源：国家天文台
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