Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-06-26
Astrophys.Space Sci. 281 (2002) 519-524
Astronomy and Astrophysics
Astrophysics
6 pages, incl. 4 figs. To appear in the proceedings of the EuroConference "The Evolution of Galaxies: II - Basic Building Bloc
Scientific paper
10.1023/A:1019533817423
We have performed TreeSPH simulations of galaxy formation in a standard LCDM cosmology, including effects of star formation, energetic stellar feedback processes and a meta-galactic UV field, and obtain a mix of disk, lenticular and elliptical galaxies. The disk galaxies are deficient in angular momentum by only about a factor of two compared to observed disk galaxies. The stellar disks have approximately exponential surface density profiles, and those of the bulges range from exponential to r^{1/4}, as observed. The bulge-to-disk ratios of the disk galaxies are consistent with observations and likewise are their integrated B-V colours, which have been calculated using stellar population synthesis techniques. Furthermore, we can match the observed I-band Tully-Fisher (TF) relation, provided that the mass-to-light ratio of disk galaxies, (M/L_I), is about 0.8. The ellipticals and lenticulars have approximately r^{1/4} stellar surface density profiles, are dominated by non-disklike kinematics and flattened due to non-isotropic stellar velocity distributions, again consistent with observations.
Götz Martin
Portinari Laura
Sommer-Larsen Jesper
No associations
LandOfFree
CDM, Feedback and the Hubble Sequence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CDM, Feedback and the Hubble Sequence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CDM, Feedback and the Hubble Sequence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-195673