The Impact of Suzaku Measurements on Astroparticle Physics

TL;DR

This paper reviews Suzaku X-ray observations of galaxy clusters, focusing on thermal and non-thermal emissions, and discusses implications for gas physics, particle acceleration, and magnetic fields in clusters.

Contribution

It provides a comprehensive summary of Suzaku's measurements of non-thermal X-ray emission in galaxy clusters and compares these findings with other satellites, highlighting current status and future prospects.

Findings

No significant non-thermal hard X-ray emission detected in studied clusters.

Observed hard X-ray emission is consistent with thermal models, including super-hot gas.

Suzaku measurements contribute to understanding cluster magnetic fields and particle acceleration.

Abstract

Results from the Suzaku X-ray broad-band observations of clusters of galaxies are summarized. Aiming at understanding the physics of gas heating/particle acceleration and the cluster dynamical evolution, we search for non-thermal hard X-ray emission from merging clusters, particularly A2163 and the Bullet Cluster, based on the Suzaku and XMM-Newton/Chandra joint analyses. The observed hard X-ray emission is well represented by single- or multi-temperature thermal models, including super-hot (kT~20 keV) gas. However, no significant non-thermal hard X-ray emission has been detected. Together with the presently available literature, the hard X-ray properties have been studied for about 10 clusters with Suzaku. The present status on Suzaku measurements of non-thermal X-ray emission and the cluster magnetic field are summarized and compared with those from the RXTE, BeppoSAX, and Swift satellites. The future prospects are briefly mentioned.