Cluster Formation Rate in Models with Dark Energy

Details Cluster Formation Rate in Models with Dark Energy Cluster Formation Rate in Models with Dark Energy

2003-03-05

arxiv.org/abs/astro-ph/0303112v2

Astrophys.J. 590 (2003) 636-640

Astronomy and Astrophysics

Astrophysics

13 pages, including 3 figures, accepted for publication in ApJ Vol: 590, June 2003. Minor changes

Scientific paper

10.1086/375154

Based on flat Friedmann-Robertson Walker cold dark matter (CDM) type models driven by non-relativistic matter and an exotic fluid (quintessence) with an equation of state: $p_{Q}=w\rho_{Q}$ ($-1\le w<0$), we investigate whether or not the large scale dynamical effects regarding the cluster formation and virialization are related to the cosmic equation of state. Using the non-linear spherical collapse we find that the cluster formation rate, in quintessence models, is intermediate between the open and $\Lambda$CDM respectively. For the QCDM case, using the virial theorem and energy conservation and assuming a spherical mass overdensity shell, we obtain analytically the ratio between the final (virial) and the turn-around radius. We find that the above ratio is almost independent from the equation of state.

Affiliated with

Also associated with

No associations

Rating

Cluster Formation Rate in Models with Dark Energy 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 Cluster Formation Rate in Models with Dark Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cluster Formation Rate in Models with Dark Energy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-490887