Star formation in extragalactic HII regions. Determination of parameters of the initial mas function

被引：6
|
作者：
Sakhibov, FK
Smirnov, MA
机构：
[1] Tajik Acad Sci, Inst Astrophys, Dushanbe 734670, Tajikistan
[2] Russian Acad Sci, Inst Astron, Moscow 109017, Russia
来源：
ASTRONOMY REPORTS | 2001年 / 45卷 / 01期
基金：
英国生物技术与生命科学研究理事会;
关键词：
D O I：
10.1134/1.1336596
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A method for using the colors of star-forming complexes to derive the slope and upper mass limit of the initial mass function (IMF) and the age of the complex is proposed in the framework of synthetic evolutionary models of star-cluster populations. The star-formation parameters of 105 complexes in 20 spiral and irregular galaxies are determined. The IMF slopes in different star-forming complexes differ appreciably, and their dependence on the luminosities and masses of the complexes is derived. The duration of the star-formation period increases with the luminosity of the complex, and complexes with longer star-formation periods are richer in metals. The slope of the integrated IMF in a Galaxy depends on the mass spectrum of its complexes, and the upper mass limit of the IMF is lower in early-type spirals. (C) 2001 MAIK "Nauka/Interperiodica".
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页码：1 / 15
页数：15
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