Are Simulations of CDM Consistent with Galactic-Scale Observations at High Redshift?

Details Are Simulations of CDM Consistent with Galactic-Scale Observations at High Redshift? Are Simulations of CDM Consistent with Galactic-Scale Observations at High Redshift?

2001-08-09

arxiv.org/abs/astro-ph/0108154v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 color figures; Submitted to ApJL

Scientific paper

10.1086/324015

We compare new observations on the kinematic characteristics of the damped Lya systems against results from numerical SPH simulations to test the predictions of hierarchical galaxy formation. This exercise is particularly motivated by recent numerical results on the cross-section of damped Lya systems. Our analysis focuses on the velocity widths of ~50 low-ion absorption profiles from our sample of z>1.5 damped Lya systems. The results indicate that current numerical simulations fail to match the damped Lya observations at high confidence levels (>99.9%). Although we do not believe that our results present an insurmountable challenge to the paradigm of hierarchical cosmology, the damped Lya observations suggest that current numerical SPH simulations overlook an integral aspect of galaxy formation.

Affiliated with

Also associated with

No associations

Rating

Are Simulations of CDM Consistent with Galactic-Scale Observations at High Redshift? 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 Are Simulations of CDM Consistent with Galactic-Scale Observations at High Redshift?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are Simulations of CDM Consistent with Galactic-Scale Observations at High Redshift? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-612891