The thick disc component of the Galaxy from near infrared colour-magnitude diagrams

被引：61

作者：

Cabrera-Lavers, A ^{[1
]}

Garzón, F

Hammersley, PL

机构：

[1] Inst Astrofis Canarias, Tenerife 38200, Spain

[2] Univ La Laguna, Dept Astrofis, Tenerife 38200, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2005年 / 433卷 / 01期

关键词：

Galaxy : general; Galaxy : stellar content; Galaxy : structure; infrared : stars; Galaxy : disk;

D O I：

10.1051/0004-6361:20041255

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The vertical distribution of K giants stars is analyzed using 2MASS data and a semiempirical method of extracting stellar densities from the K/J - K colour - magnitude diagrams. The vertical density distribution of red clump giant stars can be described by a double exponential, with scaleheights of 268.81 +/- 12.65 pc and 1061.9 +/- 52.16 pc. These values are in agreement with the expected values for the thin and thick disc components of the Milky Way. For the thick disc, the radial scalelength is also obtained, with a value of h(R) = 3.04 +/- 0.11 kpc.

引用

页码：173 / 183

页数：11