A new method to determine star formation histories of nearby galaxies

被引：105

作者：

Dolphin, A

机构：

[1] University of Washington, Box 351580, Seattle

来源：

NEW ASTRONOMY | 1997年 / 2卷 / 05期

关键词：

galaxies; stellar content; Hertzsprung-Russell;

D O I：

10.1016/S1384-1076(97)00029-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new method for the study of the star formation histories of nearby galaxies with resolved stars is presented here. Rather than adopting traditional methods of creating synthetic color-magnitude diagrams (CMDs) with various star formation histories, the approach taken is to create a set of CMDs which can be combined linearly to reproduce almost any star formation history, and use a numerical fit to solve the problem. In addition, a quantitative fit parameter for determining the similarity of an observed and a theoretical CMD is presented, along with a number of tests of this parameter. Finally, a rigorous test of the method is given. (C) 1997 Elsevier Science B.V.

引用

页码：397 / 409

页数：13

共 6 条

[1]

FLOWER P, 1976, THESIS U WASHINGTON

[2] The Local Group dwarf irregular galaxy NGC 6822 .2. The old and intermediate-age star formation history [J].