Age estimates of globular clusters in the Milky Way: Constraints on cosmology

被引：255

作者：

Krauss, LM

Chaboyer, B

机构：

[1] Case Western Reserve Univ, Dept Phys & Astron, Cleveland, OH 44106 USA

[2] Dartmouth Coll, Dept Phys & Astron, Wilder Lab 6127, Hanover, NH 03755 USA

来源：

SCIENCE | 2003年 / 299卷 / 5603期

关键词：

D O I：

10.1126/science.1075631

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Recent observations of stellar globular clusters in the Milky Way Galaxy, combined with revised ranges of parameters in stellar evolution codes and new estimates of the earliest epoch of globular cluster formation, result in a 95% confidence level lower limit on the age of the Universe of 11.2 billion years. This age is inconsistent with the expansion age for a. at Universe for the currently allowed range of the Hubble constant, unless the cosmic equation of state is dominated by a component that violates the strong energy condition. This means that the three fundamental observables in cosmology-the age of the Universe, the distance-redshift relation, and the geometry of the Universe-now independently support the case for a dark energy dominated Universe.

引用

页码：65 / 69

页数：5

共 46 条

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