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Spectral energy and age distributions for 51 globular cluster candidates
Ma, J; Zhou, X; Chen, JS; Wu, H; Kong, X; Jiang, ZJ; Zhu, J; Xue, SJ
Source PublicationACTA ASTRONOMICA
AbstractThis paper is the fourth in a series presenting spectrophotometry of 51 globular cluster candidates, that were detected by Mochcjska et al. in the nearby galaxy M33 using the data collected by the DIRECT project. The frames of M33 in this study were taken as a part of the BATC Multicolor Sky Survey. We obtained the spectral energy distributions of these candidates in 13 intermediate-band filters. By comparing the integrated photometric measurements with theoretical stellar population synthesis models of Bruzual and Chariot, we estimated their ages. The BC96 models provide the evolution in time of the spectrophotometric properties of simple stellar population for a wide range of stellar metallicity. Our results show that half of the candidates are younger than 101 years. We also find that globular clusters formed continuously in M33 from 4 x 10(6) to 10(10) years. Our results are in agreement with Chandar et al. who estimated ages for 35 globular clusters candidates from our list by comparing the photometric measurements to integrated colors from theoretical models by Bertelli et al. The Kolmogorov-Smimov test shows that the maximum value of the absolute difference of estimated ages between Chandar et al. and us is 0.48, and the significance level probability is 100.00%.
KeywordGalaxies : Individual : M33 Galaxies : Evolution Galaxies : Clusters : General
Indexed BySCI
WOS IDWOS:000180442700006
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Ma, J,Zhou, X,Chen, JS,et al. Spectral energy and age distributions for 51 globular cluster candidates[J]. ACTA ASTRONOMICA,2002,52(4):453-470.
APA Ma, J.,Zhou, X.,Chen, JS.,Wu, H.,Kong, X.,...&Xue, SJ.(2002).Spectral energy and age distributions for 51 globular cluster candidates.ACTA ASTRONOMICA,52(4),453-470.
MLA Ma, J,et al."Spectral energy and age distributions for 51 globular cluster candidates".ACTA ASTRONOMICA 52.4(2002):453-470.
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