Sunyaev-Zel'dovich Effect Signals in Cluster Models

Details Sunyaev-Zel'dovich Effect Signals in Cluster Models Sunyaev-Zel'dovich Effect Signals in Cluster Models

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.7716r&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #77.16; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astrophysics

Scientific paper

The upcoming generation of Sunyaev-Zel’dovich effect (SZE) surveys will shed fresh light onto the study of clusters. What will this new observational window reveal about cluster properties? What can we learn from combining X-ray, SZE, and optical observations? How do variations in the gas entropy profile, dark matter concentration, accretion pressure, and intracluster medium (ICM) mass fraction affect SZE observables? We investigate the signature of these important cluster parameters with an analytic model of the ICM. Given the current uncertainties in ICM physics, our approach is to span the range of plausible models motivated by observations and a small set of assumptions. We find a tight relation between the central Compton parameter and the X-ray luminosity outside the cluster core, suggesting that these observables carry the same information about the ICM. The total SZE luminosity is proportional to the thermal energy of the gas, and is a surprisingly robust indicator of cluster mass: LSZ α fICM M5/3. We show that a combination of LSZ and the half-luminosity radius rSZ provides a measure of the potential energy of the cluster gas, and thus we can deduce the total energy content of the ICM. We caution that any systematic variation of the ICM mass fraction will distort the expected LSZ M calibration to be used to study the evolution of cluster number density, and propose a technique using kSZ to constrain fICM(M,z).
B. A. R. acknowledges support from the National Science Foundation (NSF) Graduate Research Fellowship. D. N. S. acknowledges support from NASA Astrophysics Theory Program NNG04GK55G and NSF PIRE grant OISE-0530095.

Affiliated with

Also associated with

No associations

Rating

Sunyaev-Zel'dovich Effect Signals in Cluster Models 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 Sunyaev-Zel'dovich Effect Signals in Cluster Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sunyaev-Zel'dovich Effect Signals in Cluster Models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1157996