The Dark Blue Compact Dwarf Galaxy NGC 2915

Publications of the Astronomical Society of Australia

Gerhardt R. Meurer¹ 

关键词: galaxies: individual (NGC 2915);    galaxies: kinematics and dynamics;    dark matter;   

DOI  :  10.1071/AS97077

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

Recent results on NGC 2915, the first blue compact dwarf galaxy to have its mass distribution modelled, are summarised. NGC 2915 is shown to have HI well beyond its detected optical extent. Its rotation curve is well determined and fit with maximum disk mass models. The dark matter halo dominates the mass distribution at nearly all radii, and has a very dense core compared to those of normal galaxies. High-mass star formation energises the HI in the centre of the galaxy, but appears to be maintained in viriai equilibrium with the dark matter halo. The implications of these results are briefly discussed.

【 授权许可】

Unknown