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Spectral energy distributions and age estimates of 172 globular clusters in M31
Jiang, LH; Ma, J; Zhou, X; Chen, JS; Wu, H; Jiang, ZJ
2003-02-01
Source PublicationASTRONOMICAL JOURNAL
Volume125Issue:2Pages:727-741
AbstractIn this paper, we present CCD multicolor photometry for 172 globular clusters (GCs), taken from the Bologna catalog (Battistini et al., published in 1987), in the nearby spiral galaxy M31. The observations were carried out by using the National Astronomical Observatories' 60/90 cm Schmidt telescope in 13 intermediate-band filters, which covered a range of wavelengths from 3800 to 10,000 Angstrom. This provides a multicolor map of M31 in pixels of 1."7 x 1."7. By aperture photometry, we obtain the spectral energy distributions for these GCs. Using the relationship between the Beijing-Arizona-Taiwan-Connecticut intermediate-band system used for the observations and the UBVRI broadband system, the magnitudes in the B and V bands are derived. The computed V and B V are in agreement with the values given by Battistini et al. and Barmby et al. ( published in 2000). Finally, by comparing the photometry of each GC with theoretical stellar population synthesis models, we estimate ages of the sample GCs for different metallicities. The results show that nearly all our sample GCs have ages of more than 10(9) yr, and most of them are around 10(10) yr old. In addition, we find that GCs fitted by the metal-poor model are generally older than ones fitted by the metal-rich model.
KeywordGalaxies : Evolution Galaxies : Individual (M31) Globular Clusters : General
Indexed BySCI
Language英语
WOS IDWOS:000180635900022
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8433
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Peking Univ, Chinese Acad Sci, Joint Beijing Astrophys Ctr, Beijing 100871, Peoples R China
3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Jiang, LH,Ma, J,Zhou, X,et al. Spectral energy distributions and age estimates of 172 globular clusters in M31[J]. ASTRONOMICAL JOURNAL,2003,125(2):727-741.
APA Jiang, LH,Ma, J,Zhou, X,Chen, JS,Wu, H,&Jiang, ZJ.(2003).Spectral energy distributions and age estimates of 172 globular clusters in M31.ASTRONOMICAL JOURNAL,125(2),727-741.
MLA Jiang, LH,et al."Spectral energy distributions and age estimates of 172 globular clusters in M31".ASTRONOMICAL JOURNAL 125.2(2003):727-741.
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