037-b327 in M31: Luminous globular cluster or core of a former dwarf spheroidal companion to M31?
文献类型：期刊论文
| 作者 | Ma, J ; van den Bergh, S; Wu, H; Yang, YB; Zhou, X; Chen, JS; Wu, ZY; Jiang, ZJ; Wu, JH
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2006-01-10 |
| 卷号 | 636期号:2页码:L93-L95 |
| 关键词 | galaxies : evolution galaxies : individual (M31) globular clusters : individual (037-B327) |
| 英文摘要 | The cluster 037-B327 is of interest because it is both the most luminous and the most highly reddened cluster known in M31. Deep observations with the Advanced Camera for Surveys on the Hubble Space Telescope provide photometric data in the F606W band and also show that this cluster is crossed by a dust lane. We have determined the structural parameters of 037-B327 by fitting the observed surface brightness distribution to a King model with r(c) = 0".72 (=2.69 pc), r(t) = 5".87 (=21.93 pc), and a concentration index c = log (r(t)/r(c)) = 0.91. The surface brightness profile appears to be essentially flat within 0".25 of the center and shows no signs of core collapse. Although the dust lane affects the photometry, the King model fits the surface brightness profile well except for the regions badly affected by the dust lane. We also calculate the half-light radius, r(h) = 1".11 (=4.15 pc). Combined with previous photometry, we find that this object falls in the same region of the M V versus log R h diagram as do omega Centauri, M54, and NGC 2419 in the Milky Way and the massive cluster G1 in M31. All four of these objects have been claimed to be the stripped cores of former dwarf galaxies. This suggests that 037-B327 may also be the stripped core of a former dwarf companion to M31. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000234469700009 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7040]  |
| 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.Natl Res Council Canada, Herzberg Inst Astrophys, Dominion Astrophys Observ, Victoria, BC V9E 2E7, Canada |
| 推荐引用方式 GB/T 7714 | Ma, J,van den Bergh, S,Wu, H,et al. 037-b327 in M31: Luminous globular cluster or core of a former dwarf spheroidal companion to M31?[J]. ASTROPHYSICAL JOURNAL,2006,636(2):L93-L95. |
| APA | Ma, J.,van den Bergh, S.,Wu, H.,Yang, YB.,Zhou, X.,...&Wu, JH.(2006).037-b327 in M31: Luminous globular cluster or core of a former dwarf spheroidal companion to M31?.ASTROPHYSICAL JOURNAL,636(2),L93-L95. |
| MLA | Ma, J,et al."037-b327 in M31: Luminous globular cluster or core of a former dwarf spheroidal companion to M31?".ASTROPHYSICAL JOURNAL 636.2(2006):L93-L95. |
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来源：国家天文台
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