Age estimations of M31 globular clusters from their spectral energy distributions
文献类型：期刊论文
| 作者 | Ma, J ; Zhou, X; Burstein, D; Yang, Y; Fan, Z; Chen, J; Jiang, Z; Wu, Z; Wu, J; Zhang, T
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2006-04-01 |
| 卷号 | 449期号:1页码:143-U47 |
| 关键词 | galaxies : individual : M31 galaxies : star clusters galaxies : evolution |
| 英文摘要 | This paper presents accurate spectral energy distributions (SEDs) of 15 M31 globular clusters (GCs) confirmed by spectroscopy and/or high spatial-resolution imaging, as well as 30 M31 globular cluster candidates detected by Mochejska et al. ( 1998, AcA, 48, 455). Most of these candidates have m(V) > 18, deeper than previous searches, and these candidates have not yet been confirmed to be globular clusters. The SEDs of these clusters and candidates are obtained as part of the BATC Multicolor Survey of the Sky, in which the spectrophotometrically-calibrated CCD images of M31 in 13 intermediate-band filters from 4000 to 10 000 angstrom were observed. These filters are specifically designed to exclude most of the bright and variable night-sky emission lines including the OH forest. In comparison to the SEDs of true GCs, we find that some of the candidate objects are not GCs in M31. SED fits show that theoretical simple stellar population (SSP) models can fit the true GCs very well. We estimate the ages of these GCs by comparing with SSP models. We find that, the M31 clusters range in age from a few ten Myr to a few Gyr old, as well as old GCs, confirming the conclusion that has been found by Barmby et al. ( 2000, AJ, 119, 727), Williams & Hodge ( 2001, ApJ, 548, 190), Beasley et al. ( 2004, AJ, 128, 1623), Burstein et al. ( 2004, ApJ, 614, 158) and Puzia et al. ( 2005, A&A, 434, 909) in their investigations of the SEDs of M31 globular clusters. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000235991600017 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7049]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA |
| 推荐引用方式 GB/T 7714 | Ma, J,Zhou, X,Burstein, D,et al. Age estimations of M31 globular clusters from their spectral energy distributions[J]. ASTRONOMY & ASTROPHYSICS,2006,449(1):143-U47. |
| APA | Ma, J.,Zhou, X.,Burstein, D.,Yang, Y.,Fan, Z.,...&Zhang, T.(2006).Age estimations of M31 globular clusters from their spectral energy distributions.ASTRONOMY & ASTROPHYSICS,449(1),143-U47. |
| MLA | Ma, J,et al."Age estimations of M31 globular clusters from their spectral energy distributions".ASTRONOMY & ASTROPHYSICS 449.1(2006):143-U47. |
入库方式： OAI收割
来源：国家天文台
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