The HSB/LSB galaxies NGC 2403 and UGC 128

被引：22
|
作者：
Verheijen, M
de Blok, E
机构：
[1] Natl Radio Astron Observ, Charlottesville, VA 22903 USA
[2] Australia Telescope Natl Facil, Epping, NSW 2121, Australia
来源：
ASTROPHYSICS AND SPACE SCIENCE | 1999年 / 269卷 / 0期
关键词：
Dark Matter; Rotation Curve; Stellar Disk; Radial Scale; Dark Matter Distribution;
D O I：
10.1023/A:1017015229229
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have decomposed the rotation curves of the high surface brightness (HSB) galaxy NGC2403 and the low surface brightness (LSB) system UGC128. Both galaxies have a similar baryon content and rotational velocities but have very different disk scale lengths and angular momentum contents. On a linear scale, the rotation curve of the HSB galaxy rises much steeper than that of the LSB galaxy but once scaled with the scale lengths of the stellar disks, the rotation curves are practically indistinguishable. The inferred stellar M/Ls from maximum-disk decompositions are reasonable for the HSB galaxy but are excessively high for the LSB galaxy. Assuming both galaxies are embedded in a similar halo results in more acceptable stellar M/Ls for both galaxies with the HSB galaxy being close to a maximum-disk situation while the LSB galaxy is dark matter dominated.
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页码：673 / 674
页数：2
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