Fundamental parameters of the highly reddened young open clusters Westerlund 1 and 2

被引：64

作者：

Piatti, AE

Bica, E

Claria, JJ

机构：

[1] Univ Nacl Cordoba, Astron Observ, RA-5000 Cordoba, Argentina

[2] Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

来源：

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1998年 / 127卷 / 03期

关键词：

open clusters; individual; Westerlund; 1; 2; general;

D O I：

10.1051/aas:1998111

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the compact open clusters Westerlund 1 (BH 197) and Westerlund 2. We present CCD integrated spectroscopy for both clusters, and CCD imaging in the V and I bands for the former one. So far, Westerlund 1 is possibly the most reddened open cluster studied in detail (A(nu) approximate to 13.0). It has an age of 8 +/- 3 Myr and a distance from the Sun of d. approximate to 1.0 +/- 0.4 kpc. I?br Westerlund 2 we derive a visual absorption A(V) approximate to 5.0 mag, an age of 2 - 3 Myr, End d. = 5.7 +/- 0.3 kpc. From luminosity and structural arguments we conclude that Westerlund 1, although young and compact, it is a massive cluster, in contrast to Westerlund 2.

引用

页码：423 / 432

页数：10

共 47 条

[1]

ALTER G, 1970, CATALOGUE STAR CLUST

[2]

[Anonymous], 1952, PUBL ASTRON SOC PAC, DOI [DOI 10.1086/126462, 10.1086/126462]

[3]

[Anonymous], 1961, ARK ASTRON

[4]

[Anonymous], PASP