Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-02-10
Astrophys.J. 623 (2005) L63-L66
Astronomy and Astrophysics
Astrophysics
4+ pages, 2 figures, accepted to ApJ Letters; minor changes to text, added references
Scientific paper
10.1086/430144
We investigate empirical scaling relations between the thermal Sunyaev-Zeldovich effect (SZE) and cluster mass in simulated clusters of galaxies. The simulated clusters have been compiled from four different samples that differ only in their assumed baryonic physics. We show that the strength of the thermal SZE integrated over a significant fraction of the virialized region of the clusters is relatively insensitive to the detailed heating and cooling processes in the cores of clusters by demonstrating that the derived scaling relations are nearly identical between the four cluster samples considered. For our synthetic images, the central Comptonization parameter shows significant boosting during transient merging events, but the integrated SZE appears to be relatively insensitive to these events. Most importantly, the integrated SZE closely tracks the underlying cluster mass. Observations through the thermal SZE allow a strikingly accurate mass estimation from relatively simple measurements that do not require either parametric modeling or geometric deprojection and thus avoid assumptions regarding the physics of the ICM or the symmetry of the cluster. This result offers significant promise for precision cosmology using clusters of galaxies.
Burns O. Jr. J.
Hallman Eric J.
Motl Patrick M.
Norman Michael L.
No associations
LandOfFree
The Integrated Sunyaev-Zeldovich Effect as the Superior Method for Measuring the Mass of Clusters of Galaxies 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 The Integrated Sunyaev-Zeldovich Effect as the Superior Method for Measuring the Mass of Clusters of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Integrated Sunyaev-Zeldovich Effect as the Superior Method for Measuring the Mass of Clusters of Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-54465