Effects of the UV background radiation on galaxy formation

Details Effects of the UV background radiation on galaxy formation Effects of the UV background radiation on galaxy formation

1998-04-16

arxiv.org/abs/astro-ph/9804153v2

Mon.Not.Roy.Astron.Soc. 305 (1999) 449-456

Astronomy and Astrophysics

Astrophysics

9 pages, 10 figures (4 pages and 5 figures added)

Scientific paper

10.1046/j.1365-8711.1999.02438.x

We investigate the effects of the UV background radiation on galaxy formation by using the semi-analytic model including the photoionization process. The semi-analytic model is based on Cole et al. (1994) and we use almost the same parameters of their `fiducial' model. We find that the UV background mainly affects the formation of dwarf galaxies. Because of the suppression of star formation, the number density of small objects corresponding to dwarf galaxies decreases compared to the case of no UV radiation when the UV background exists until the present epoch. When the UV background vanishes at a low redshift, the number density of small objects is hardly changed but the colour becomes bluer, compared to the case of no UV radiation, because stars are newly formed after the UV background vanishes. On the other hand, the UV radiation hardly affects massive galaxies. This is because the massive galaxies are formed by mergers of small galaxies.

Affiliated with

Also associated with

No associations

Rating

Effects of the UV background radiation on galaxy formation 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 Effects of the UV background radiation on galaxy formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of the UV background radiation on galaxy formation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-634494