A catalog of OB associations in the spiral galaxy NGC 300

被引：42

作者：

Pietrzynski, G

Gieren, W

Fouqué, P

Pont, A

机构：

[1] Univ Concepcion, Dept Fis, Concepcion, Chile

[2] Observ Paris, DESPA, F-92195 Meudon, France

[3] European So Observ, Santiago 19, Chile

[4] Univ Chile, Dept Astron, Santiago, Chile

[5] Univ Warsaw Observ, PL-00478 Warsaw, Poland

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 371卷 / 02期

关键词：

galaxies : NGC 300 : star clusters; galaxies : stellar content stars : early type;

D O I：

10.1051/0004-6361:20010401

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of a search for OB associations in NGC 300. Using an automatic and objective method (PLC technique) 117 objects were found. Statistical tests indicate that our sample is contaminated by less than 10 detections due to random concentrations of blue stars. Spatial distributions of detected associations and H II regions are strongly correlated. The size distribution reveals a significant peak at about 60 mu rad which corresponds to 125 parsecs if a distance modulus of 26.66 mag is assumed. Besides the objects with sizes corresponding to typical associations we also found several much larger objects. A second level application of our detection method revealed that most of these are composed of smaller subgroups, with sizes of about 100 pc.

引用

页码：497 / 506

页数：10