Galaxy Cluster Pressure Profiles as Determined by Sunyaev Zel'dovich Effect Observations with MUSTANG and Bolocam I: Joint Analysis Technique

TL;DR

This paper introduces a joint analysis technique combining MUSTANG and Bolocam SZE data to better constrain galaxy cluster pressure profiles, demonstrating improved parameter constraints and agreement with X-ray data.

Contribution

A novel joint fitting method leveraging complementary SZE data from MUSTANG and Bolocam to enhance pressure profile constraints in galaxy clusters.

Findings

High-resolution MUSTANG data improves pressure profile parameter constraints.

Fitted pressure profiles agree well with X-ray derived profiles.

Derived inner slopes of galaxy clusters are consistent with theoretical models.

Abstract

We present a technique to constrain galaxy cluster pressure profiles by jointly fitting Sunyaev-Zel'dovich effect (SZE) data obtained with MUSTANG and Bolocam for the clusters Abell 1835 and MACS0647. Bolocam and MUSTANG probe different angular scales and are thus highly complementary. We find that the addition of the high resolution MUSTANG data can improve constraints on pressure profile parameters relative to those derived solely from Bolocam. In Abell 1835 and MACS0647, we find gNFW inner slopes of $\gamma = 0.36_{-0.21}^{+0.33}$ and $\gamma = 0.38_{-0.25}^{+0.20}$, respectively when $\alpha$ and $\beta$ are constrained to 0.86 and 4.67 respectively. The fitted SZE pressure profiles are in good agreement with X-ray derived pressure profiles.