Young stars in the periphery of NGC 6822

被引：10

作者：

Battinelli, P

Demers, S

Letarte, B

机构：

[1] Osserv Astron Roma, INAF, I-00136 Rome, Italy

[2] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 405卷 / 02期

关键词：

galaxies : individual : NGC 6822; galaxies : stellar content; galaxies : structure;

D O I：

10.1051/0004-6361:20030640

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Taking advantage of the wide (42' x 28') field of the CFH12K camera, we survey the young star population of NGC 6822 to unprecedented radial distances. We determine the age of the young stars by employing Gallart's et al. (1996b) method based on the presence of stars in different boxes in the CMD. We find that star formation took place up to similar to200 Myr ago in a wide area not always matching the current HI cloud. A similar to50 Myr old association is identified, next to the HI void where no young stars are seen.

引用

页码：563 / 569

页数：7

共 19 条

[1]

BERTELLI G, 1994, ASTRON ASTROPHYS SUP, V106, P275

[2]

de Blok WJG, 2000, ASTR SOC P, V218, P357

[3] Evidence for tidal interaction and a supergiant HI shell in the local group dwarf galaxy NGC 6822 [J].