The light-weighted age and metallicity of Galactic globular clusters
The light-weighted age and metallicity of Galactic globular clusters
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银河球状星团的轻量级年龄和金属丰度
DOI:
10.1007/s10509-010-0309-y
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发表时间:
2010-02
影响因子:
1.9
通讯作者:
Zhang, Yu
中科院分区:
文献类型:
--
作者:
Zhang, Fenghui;Han, Zhanwen;Liu, Jinzhong;Zhang, Yu
Spectra synthesis is entering a new era with the availability of large and high-quality spectroscopic data and full spectrum fitting methods. Establishing the reliability whether the STARLIGHT code (a full spectrum fitting code, Cid Fernandes et al. (Mon. Not. R. Astron. Soc. 358:363, 2005)) is suitable to study the properties of various types of galaxies is vital to galaxy study. In testing this possibility, Galactic globular clusters (GCs) provide an excellent medium.Taking the 40 Galactic GCs as an example in our work, we analyze their integrated spectra from Schiavon et al. (Astrophys. J. Suppl. 160:163, 2005) and obtain their mixtures of stellar populations that best represents their composite nature. Through analyzing the distributions of stellar ages and metallicities respectively, we find that the stellar metallicity distribution is centered at a low value and the stellar age distribution is very scattered. To compare with the literature, we also calculate the light-weighted ages and metallicities of GCs, and we find that the light-weighted metallicities agree with the literature, while the light-weighted ages are lower than those of the literature. This demonstrates that STARLIGHT can be used to obtain the metallicities of GCs.
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影响因子:
6.5
作者:
A. Milone;P. Stetson;G. Piotto;L. Bedin;Jay Anderson;S. Cassisi;M. Salaris
通讯作者:
A. Milone;P. Stetson;G. Piotto;L. Bedin;Jay Anderson;S. Cassisi;M. Salaris
DOI:
10.1111/j.1365-2966.2006.10565.x
发表时间:
2005-11
影响因子:
4.8
作者:
A. Mateus;L. Sodré;R. C. Fernandes;G. Stasińska;W. Schoenell;Jean M. Gomes IAG-USP;Brazil Ufsc;
通讯作者:
A. Mateus;L. Sodré;R. C. Fernandes;G. Stasińska;W. Schoenell;Jean M. Gomes IAG-USP;Brazil Ufsc;
影响因子:
8.7
作者:
G. Worthey
通讯作者:
G. Worthey
影响因子:
6.5
作者:
J. F. C. Santos;A. E. P. ICEx-UFMG;Brazil.;IAFE-UBA;Argentina.
通讯作者:
J. F. C. Santos;A. E. P. ICEx-UFMG;Brazil.;IAFE-UBA;Argentina.
影响因子:
6.5
作者:
D. L. Borgne;B. Rocca-Volmerange;P. Prugniel;A. Lançon;M. Fioc;Caroline Soubiran Institut d'Astrophysique de Paris;U. Toronto;crAl;O. Strasbourg;O. Bordeaux
通讯作者:
D. L. Borgne;B. Rocca-Volmerange;P. Prugniel;A. Lançon;M. Fioc;Caroline Soubiran Institut d'Astrophysique de Paris;U. Toronto;crAl;O. Strasbourg;O. Bordeaux