Large-scale structure formation for power spectra with broken scale invariance

Details Large-scale structure formation for power spectra with broken scale invariance Large-scale structure formation for power spectra with broken scale invariance

1995-07-11

arxiv.org/abs/astro-ph/9507036v3

Astronomy and Astrophysics

Astrophysics

15 pages, Latex using mn.sty, uuencoded compressed ps-file with 15 figures by anonymous ftp to ftp://ftp.aip.de/incoming/muell

Scientific paper

We have simulated the formation of large-scale structure arising from COBE-normalized spectra computed by convolving a primordial double-inflation perturbation spectrum with the CDM transfer function. Due to the broken scale invariance ('BSI') characterizing the primordial perturbation spectrum, this model has less small-scale power than the (COBE-normalized) standard CDM model. The particle-mesh code (with $512^3$ cells and $256^3$ particles) includes a model for thermodynamic evolution of baryons in addition to the usual gravitational dynamics of dark matter. It provides an estimate of the local gas temperature. In particular, our galaxy-finding procedure seeks peaks in the distribution of gas that has cooled. It exploits the fact that ``cold" particles trace visible matter better than average and thus provides a natural biasing mechanism. The basic picture of large-scale structure formation in the BSI model is the familiar hierarchical clustering scenario. We obtain particle in cell statistics, the galaxy correlation function, the cluster abundance and the cluster-cluster correlation function and statistics for large and small scale velocity fields. We also report here on a semi-quantitative study of the distribution of gas in different temperature ranges. Based on confrontation with observations and comparison with standard CDM, we conclude that the BSI scenario could represent a promising modification of the CDM picture capable of describing many details of large-scale structure formation.

Affiliated with

Also associated with

No associations

Rating

Large-scale structure formation for power spectra with broken scale invariance 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 Large-scale structure formation for power spectra with broken scale invariance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-scale structure formation for power spectra with broken scale invariance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-647277