SUPER STAR CLUSTERS VERSUS OB ASSOCIATIONS
SUPER STAR CLUSTERS VERSUS OB ASSOCIATIONS
复制标题
超级明星团与 OB 协会
DOI:
10.1088/0004-637x/724/2/1503
复制
发表时间:
2010
期刊:
影响因子:
--
通讯作者:
H. Zinnecker
中科院分区:
文献类型:
--
作者:
C. Weidner;I. Bonnell;H. Zinnecker
Super star clusters (Mecl > 105 M☉) are the largest stellar nurseries in our local Universe, containing hundreds of thousands to millions of young stars within a few light years. Many of these systems are found in external galaxies, especially in pairs of interacting galaxies, and in some dwarf galaxies, but relatively few in disk galaxies like our own Milky Way. We show that a possible explanation for this difference is the presence of shear in normal spiral galaxies which impedes the formation of the very large and dense super star clusters but prefers the formation of loose OB associations possibly with a less massive cluster at the center. In contrast, in interacting galaxies and in dwarf galaxies, regions can collapse without having a large-scale sense of rotation. This lack of rotational support allows the giant clouds of gas and stars to concentrate into a single, dense, and gravitationally bound system.
DOI:
10.1088/0004-637x/707/2/1347
发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Andersen M
通讯作者:
Andersen M