Characterizing Galaxy Clusters with Gravitational Potential

Details Characterizing Galaxy Clusters with Gravitational Potential Characterizing Galaxy Clusters with Gravitational Potential

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...736..145l&link_type=abstract

The Astrophysical Journal, Volume 736, Issue 2, article id. 145 (2011).

Astronomy and Astrophysics

Astronomy

1

Cosmology: Theory, Galaxies: Clusters: General, Methods: Numerical, X-Rays: Galaxies: Clusters

Scientific paper

We propose a simple estimator for the gravitational potential of cluster-size halos using the temperature and density profiles of the intracluster gas based on the assumptions of hydrostatic equilibrium and spherical symmetry. Using high-resolution cosmological simulations of galaxy clusters, we show that the scaling relation between this estimator and the gravitational potential has a small intrinsic scatter of ~8%-15%, and it is insensitive to baryon physics outside the cluster core. The slope and the normalization of the scaling relation vary weakly with redshift, and they are relatively independent of the choice of radial range used and the dynamical states of the clusters. The results presented here provide a possible way for using the cluster potential function as an alternative to the cluster mass function in constraining cosmology using galaxy clusters.

Affiliated with

Also associated with

No associations

Rating

Characterizing Galaxy Clusters with Gravitational Potential 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 Characterizing Galaxy Clusters with Gravitational Potential, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characterizing Galaxy Clusters with Gravitational Potential will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1741180