X-ray observations of the merging cluster CIZA J2242.8+5301

Abstract

Multiwavelength studies of radio relics at merger shocks set powerful constraints on the relics origin and formation mechanism. However, for X-ray observations, a main difficulty is represented by the low X-ray surface brightness far out in the cluster outskirts, where relics are typically found. Here, we present XMM-Newton results from a 130-ks observation of CIZA J2242.8+5301, a cluster at z=0.19 that hosts a double radio relic. We focus on the well-defined northern relic. There is a difference of ~55% between the temperature we measure behind the relic, and the temperature measured with Suzaku. We analyse the reasons for this large discrepancy, and discuss the possibility of reliably measuring the temperature beyond the northern relic.

To appear in the proceedings of the conference "Galaxy Clusters as Giant Cosmic Laboratories", which will be published as a regular issue of the Astronomische Nachrichten (AN)

References in corpus (5)

• Clusters of galaxies : observational properties of the diffuse radio emission
• Particle Acceleration on Megaparsec Scales in a Merging Galaxy Cluster
• Radial temperature profiles for a large sample of galaxy clusters observed with XMM-Newton
• X-ray observations of the galaxy cluster PKS 0745-191: To the virial radius, and beyond
• Further X-ray observations of the galaxy cluster PKS 0745-191 to the virial radius and beyond

Cited by in corpus (5)

• Another shock for the Bullet cluster, and the source of seed electrons for radio relics
• Multiple density discontinuities in the merging galaxy cluster CIZA J2242.8+5301
• Merging Cluster Collaboration: A Panchromatic Atlas of Radio Relic Mergers
• Abell 1033: birth of a radio phoenix
• Indications of an offset merger in Abell 3667