Cluster Sunyaev-Zeldovich Effect Scaling Relations

Details Cluster Sunyaev-Zeldovich Effect Scaling Relations Cluster Sunyaev-Zeldovich Effect Scaling Relations

2003-02-05

arxiv.org/abs/astro-ph/0302087v1

Astrophys.J. 591 (2003) 515-525

Astronomy and Astrophysics

Astrophysics

11 pages, 5 figures, uses emulateapj style. Accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/375486

X-ray observations of an "entropy floor" in nearby groups and clusters of galaxies offer evidence that important non-gravitational processes, such as radiative cooling and/or "preheating", have strongly influenced the evolution of the intracluster medium (ICM). We examine how the presence of an entropy floor modifies the thermal Sunyaev-Zeldovich (SZ) effect. A detailed analysis of scaling relations between X-ray and SZ effect observables and also between the two primary SZ effect observables is presented. We find that relationships between the central Compton parameter and the temperature or mass of a cluster are extremely sensitive to the presence of an entropy floor. The same is true for correlations between the integrated Compton parameter and the X-ray luminosity or the central Compton parameter. In fact, if the entropy floor is as high as inferred in recent analyses of X-ray data, a comparison of these correlations with both current and future SZ effect observations should show a clear signature of this excess entropy. Moreover, because the SZ effect is redshift-independent, the relations can potentially be used to track the evolution of the cluster gas and possibly discriminate between the possible sources of the excess entropy. To facilitate comparisons with observations, we provide analytic fits to these scaling relations.

Affiliated with

Also associated with

No associations

Rating

Cluster Sunyaev-Zeldovich Effect Scaling Relations 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 Cluster Sunyaev-Zeldovich Effect Scaling Relations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cluster Sunyaev-Zeldovich Effect Scaling Relations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-268820