HI imaging of cassiopeia 1

被引：2

作者：

Marvel, KB

Wilcots, EM

机构：

[1] Amer Astron Soc, Washington, DC 20009 USA

[2] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

来源：

ASTRONOMICAL JOURNAL | 2000年 / 120卷 / 04期

关键词：

galaxies; individual; (Cassiopeia; 1);

D O I：

10.1086/301588

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present H I maps of a recently discovered dwarf galaxy near the IC 342 Maffei 1-2 Group, Cassiopeia 1. Our data show that Cas 1 has a total H I mass of 1.5 x 10(8) M., assuming a distance of 4.5 Mpc. The highest column density gas forms a ring around a central depression in the H I distribution and the peak of the H I gas is offset from the distribution of starlight. Isovelocity contours indicate that the galaxy is in solid-body rotation; a region of large velocity dispersion is approximately coincident with observed current star formation activity in Cas 1.

引用

页码：2038 / 2043

页数：6

共 11 条

[1]

BAARS JWM, 1977, ASTRON ASTROPHYS, V61, P99

[2]

BRIGGS DS, 1995, THESIS U NEW MEXICO

[3] STELLAR CONTENT OF NEARBY GALAXIES .2. THE LOCAL GROUP DWARF ELLIPTICAL GALAXY-M32 [J].