Lyman break galaxies as collisional starbursts

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Galaxy Mergers, Collisions, And Tidal Interactions

Scientific paper

The nature of the galaxies recently discovered at redshift [1,2] z>~3, when the Universe was only about two billion years old, is an intriguing puzzle. They are forming stars at a high rate, comparable to local ``starburst'' galaxies [3], but while the latter are relatively rare, the high-z galaxies are as numerous as local normal galaxies. Since many local starbursts are triggered by galaxy collisions, a much higher collision rate in the past could provide a simple explanation for the high abundance of high-z galaxies [2,4]. Here we use high-resolution cosmological N-body simulations and a hierarchical halo finder to estimate the galaxy collision rate as a function of time in a popular cosmological model (ΛCDM). We find that bright collisional starbursts are indeed frequent enough to account for most of the high-z galaxies. Moreover, many of the objects are of relatively small mass, but they cluster about large-mass halos. They therefore exhibit strong clustering, similar to that observed [5-7] and stronger than that of the relevant massive halos. The collisional starburst scenario [2,4] thus appears consistent with several key properties of high-z galaxies.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Lyman break galaxies as collisional starbursts 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 Lyman break galaxies as collisional starbursts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lyman break galaxies as collisional starbursts will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1618266

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.