Distant clusters of galaxies detected by X-rays

Details Distant clusters of galaxies detected by X-rays Distant clusters of galaxies detected by X-rays

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...415...50c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 415, no. 1, p. 50-57.

Astronomy and Astrophysics

Astronomy

21

Cosmic Plasma, Dark Matter, Galactic Clusters, X Ray Astronomy, Baryons, Luminosity, Red Shift

Scientific paper

The dynamical masses of groups and clusters of galaxies decrease on average with increasing redshift, after the hierarchical cosmogonies dominated by direct collapses of dark matter overdensities. We show that the masses of intracluster plasma emitting in the X-ray band are to decrease more rapidly. We also show that consideration of the intrinsic spread in the dynamical formation times leads us to predict more numerous faint sources at given dynamical mass. The model we compute yields steeper luminosity functions in the X-ray band with a specific change in lookback time: the bright end shifts back. Such negative evolution is fast even at modest redshifts z less than about 0.5 if the external gas infalling into groups of clusters was preheated and has cooled down after z of about 1.5-2. If so, the evolution is considerably faster in the X-ray than in the optical band, comparing interestingly with data from the existing surveys.

Affiliated with

Also associated with

No associations

Rating

Distant clusters of galaxies detected by X-rays 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 Distant clusters of galaxies detected by X-rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distant clusters of galaxies detected by X-rays will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1560688