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Halo Concentration, Galaxy Red Fraction, and Gas Properties of Optically-defined Merging Clusters
Nobuhiro Okabe, Masamune Oguri, Hiroki Akamatsu +9
We present multi-wavelength studies of optically-defined merging clusters, based on the Hyper Suprime-Cam Subaru Strategic Program. Luminous red galaxies, tracing cluster mass dist…
High entropy and evidence for a merger in the low surface brightness cluster Abell 2399
Ikuyuki Mitsuishi, Yasunori Babazaki, Naomi Ota +4
We present results of the X-ray analyses of the nearby cluster of galaxies Abell 2399 () using the XMM-Newton and Suzaku satellites. This cluster is classified as a low su…
Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +191
We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrom…
Discovery of large scale shock fronts correlated with the radio halo and radio relic in the A2163 galaxy cluster
Sophia Thölken, Thomas H. Reiprich, Martin W. Sommer +1
Imprints of galaxy cluster formation processes are visible in the intracluster medium and can arise in shock fronts, which are detectable via discontinuities in e.g. the gas temper…
Cool core disturbed: Observational evidence for coexistence of sub-sonic sloshing gas and stripped shock-heated gas around the core of RX J1347.5-1145
Shutaro Ueda, Tetsu Kitayama, Masamune Oguri +13
RXJ1347.5-1145 (z = 0.451) is one of the most luminous X-ray galaxy clusters, which hosts a prominent cool core and exhibits a signature of a major merger. We present the first dir…
Suzaku Observations of Low Surface Brightness Cluster Abell 1631
Yasunori Babazaki, Ikuyuki Mitsuishi, Naomi Ota +5
We present analysis results for a nearby galaxy cluster Abell 1631 at using the X-ray observatory Suzaku. This cluster is categorized as a low X-ray surface brightness…