4 papers
X-SORTER (X-ray Survey Of meRging clusTErs in Redmapper): X-ray and Spectroscopic Characterization of 12 Optically Selected Galaxy Cluster Merger Candidates
Christopher Hopp, David Wittman, Rodrigo Stancioli +3
Merging galaxy clusters offer a unique probe of dark matter (DM) interactions through the spatial offsets between galaxies, the intracluster medium, and the DM halo. Systems that a…
A Very Rich Bimodal Galaxy Cluster Merger: RXC J0032.1+1808
David Wittman, Rodrigo Stancioli, Faik Bouhrik +2
The galaxy cluster RXC J0032.1+1808 has been well-studied with optical imaging and gravitational lensing mass maps, both of which reveal an elongated morphology in the north-south…
Line of Sight Bias in Dark Matter Inferences from Galaxy Cluster Mergers
David Wittman, Scott Adler, Rodrigo Stancioli
In collisions of galaxy clusters, the lack of displacement between dark matter and galaxies suggests that the dark matter scattering depth is small. This yields an upper limit on t…
Discovery and Multi-Wavelength Analysis of a New Dissociative Galaxy Merger: The Champagne Cluster
Faik Bouhrik, Rodrigo Stancioli, David Wittman
We report the discovery of a new binary galaxy cluster merger, the Champagne Cluster (RM J130558.9+263048.4), using a detection method that identifies dynamically active clusters i…