evolutionofm81withexponentiallydecreasingstarformationrateofpegase
文献类型：期刊论文
| 作者 | Li Jiuli; Zhou Xu ; Ma Jun; Chen Jiansheng
|
| 刊名 | chinesejournalofastronomyandastrophysics
 |
| 出版日期 | 2004 |
| 卷号 | 4期号:2页码:143 |
| ISSN号 | 1009-9271 |
| 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. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/47096]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Li Jiuli,Zhou Xu,Ma Jun,et al. evolutionofm81withexponentiallydecreasingstarformationrateofpegase[J]. chinesejournalofastronomyandastrophysics,2004,4(2):143. |
| APA | Li Jiuli,Zhou Xu,Ma Jun,&Chen Jiansheng.(2004).evolutionofm81withexponentiallydecreasingstarformationrateofpegase.chinesejournalofastronomyandastrophysics,4(2),143. |
| MLA | Li Jiuli,et al."evolutionofm81withexponentiallydecreasingstarformationrateofpegase".chinesejournalofastronomyandastrophysics 4.2(2004):143. |
入库方式： OAI收割
来源：国家天文台
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。