中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
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
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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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