THE CONTRIBUTIONS OF INTERACTIVE BINARY STARS TO DOUBLE MAIN-SEQUENCE TURNOFFS AND DUAL RED CLUMP OF INTERMEDIATE-AGE STAR CLUSTERS
THE CONTRIBUTIONS OF INTERACTIVE BINARY STARS TO DOUBLE MAIN-SEQUENCE TURNOFFS AND DUAL RED CLUMP OF INTERMEDIATE-AGE STAR CLUSTERS
复制标题
交互双星对双主序转向和中年龄星团双红团簇的贡献
DOI:
10.1088/2041-8205/731/2/l37
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发表时间:
2011-03
影响因子:
7.9
通讯作者:
Liu, Kang
中科院分区:
文献类型:
--
作者:
Yang, Wuming;Meng, Xiangcun;Bi, Shaolan;Tian, Zhijia;Li, T;a;Liu, Kang
Double or extended main-sequence turnoffs (DMSTOs) and dual red clump (RC) were observed in intermediate-age clusters, such as in NGC 1846 and 419. The DMSTOs are interpreted as that the cluster has two distinct stellar populations with differences in age of about 200–300 Myr but with the same metallicity. The dual RC is interpreted as a result of a prolonged star formation. Using a stellar population-synthesis method, we calculated the evolution of a binary-star stellar population. We found that binary interactions and merging can reproduce the dual RC in the color–magnitude diagrams of an intermediate-age cluster, whereas in actuality only a single population exists. Moreover, the binary interactions can lead to an extended main-sequence turnoff (MSTO) rather than DMSTOs. However, the rest of the main sequence, subgiant branch, and first giant branch are hardly spread by the binary interactions. Part of the observed dual RC and extended MSTO may be the results of binary interactions and mergers.
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影响因子:
6.5
作者:
A. Milone;L. Bedin;G. Piotto;Jay Anderson
通讯作者:
A. Milone;L. Bedin;G. Piotto;Jay Anderson
DOI:
10.1046/j.1365-8711.2002.05038.x
发表时间:
2002-01
影响因子:
4.8
作者:
J. Hurley;C. Tout;O. Pols
通讯作者:
J. Hurley;C. Tout;O. Pols
DOI:
10.1086/427796
发表时间:
2004-12
期刊:
The Astrophysical Journal
影响因子:
--
作者:
G. Piotto;S. Villanova;L. Bedin;R. Gratton;S. Cassisi;Y. Momany;A. Recio-Blanco;S. Lucatello;
通讯作者:
G. Piotto;S. Villanova;L. Bedin;R. Gratton;S. Cassisi;Y. Momany;A. Recio-Blanco;S. Lucatello;
DOI:
10.1046/j.1365-8711.2000.03426.x
发表时间:
2000-01
影响因子:
4.8
作者:
J. Hurley;O. Pols;C. Tout
通讯作者:
J. Hurley;O. Pols;C. Tout
DOI:
10.1111/j.1365-2966.2008.13915.x
发表时间:
2008-09
影响因子:
4.8
作者:
A. D'ercole;E. Vesperini;F. D’Antona;S. McMillan;S. Recchi
通讯作者:
A. D'ercole;E. Vesperini;F. D’Antona;S. McMillan;S. Recchi