Truncated initial mass function in starburst galaxies
Truncated initial mass function in starburst galaxies
复制标题
星暴星系中截断的初始质量函数
DOI:
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发表时间:
1993
期刊:
影响因子:
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通讯作者:
J. Silk
中科院分区:
文献类型:
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作者:
S. Charlot;F. Ferrari;G. Mathews;J. Silk
Observations of nearby star-forming regions suggest that the initial mass function is deficient in low-mass stars when the ambient star formation rate is high. We use new models of stellar population synthesis to investigate how a truncation of the lower end of the initial mass function affects the photometric evolution of starburst galaxies. A major difference with respect to the case of a standard initial mass function is that the spectra of the galaxies become unusually red (V-K≥3.5) when the turnoff mass reaches the lower mass cutoff. This red phase can last for more than 10 9 yr if the lower mass cutoff is below 2 M ○.