Mass function, velocity dispersion and temperature function of clusters in the Cold + Hot dark matter model

Details Mass function, velocity dispersion and temperature function of clusters in the Cold + Hot dark matter model Mass function, velocity dispersion and temperature function of clusters in the Cold + Hot dark matter model

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.6209j&link_type=abstract

American Astronomical Society, 184th AAS Meeting, #62.09; Bulletin of the American Astronomical Society, Vol. 26, p.964

Astronomy and Astrophysics

Astronomy

Scientific paper

Using a set of P(3) M simulation which accurately treats the density evolution of two components of dark matter, we study the evolution of clusters in the Cold + Hot dark matter (CHDM) model. The mass function, the velocity dispersion function and the temperature function of clusters are calculated for four different epochs of z<= 0.5. We also use the simulation data to test the Press-Schechter expression of the halo abundance as a function of the velocity dispersion sigma_v . The model predictions are in good agreement with the observational data of local cluster abundances (z=0). We also tentatively compare the model with the Gunn and his collaborators' observation of rich clusters at z~ 0.8 and with the x-ray luminous clusters at z~ 0.5 of the Einstein Extended Medium Sensitivity Survey. The important feature of the model is the rapid formation of clusters in the near past: the abundances of clusters of sigma_v >= 700kms(-1) and of sigma_v >= 1200kms(-1) at z=0.5 are only 1/4 and 1/10 respectively of the present values (z=0). Ongoing ROSAT and AXAF surveys of distant clusters will provide sensitive tests to the model. The abundance of clusters at z~ 0.5 would also be a good discriminator between the CHDM model and a low-density flat CDM model both of which show very similar clustering properties at z=0.

Affiliated with

Also associated with

No associations

Rating

Mass function, velocity dispersion and temperature function of clusters in the Cold + Hot dark matter model 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 Mass function, velocity dispersion and temperature function of clusters in the Cold + Hot dark matter model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass function, velocity dispersion and temperature function of clusters in the Cold + Hot dark matter model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-883913