A double radio relic cluster that is part of a vast filamentary structure. The weak-lensing mass distribution is detected for the A1240 merging cluster and its companion A1237.

A radio and weak-lensing analysis of a high-z merging cluster. A radio relic with that is remarkably bow shaped and comparable to the Sausage cluster. Three subclusters are found with one that contains no X-ray counterpart.

Merging galaxy clusters that exhibit double radio relics are rare, especially those with two comparably bright relics. This weak-lensing analysis presents the mass distributions of the most symmetric merging systems that we have studied. These are ideal for follow-up simulations.

A tremendous, symmetric merging galaxy cluster that consists of two subclusters of equal mass. Our analysis of LOFAR radio observations characterizes the unique radio features of a double relic cluster.

Abell 521 is a massive merging system with three subclusters. The radio relic is found to the southeast and likely formed from a past merger between the massive central cluster and the subcluster found in the southeast.

We have discovered evidence for a cooling flow in SpARCS1049 in Chandra X-ray observations. The cool gas that we detected coincides with the previously detected (Webb et al. 2015/2017) burst of star formation. This is an exciting find for an emerging galaxy cluster.

A new radio relic cluster was detected in the EMU/ASKAP radio continuum survey. We detected its weak-lensing signal and mapped its dark matter distribution. This merging cluster appears to be in an early evolutionary stage, seen just after pericent passage.

Detecting weak gravitational lensing relies on a good sample of galaxies located beyond the galaxy cluster of interest. This fact makes high redshift lensing difficult and expensive. With deep Hubble Space Telescope infrared imaging, we were able to detect the weak-lensing signal from a galaxy cluster in the early universe.

This merging cluster is highlighted by its intriguing intracluster medium morphology. Both subclusters show signs of gas stripping. Our weak-lensing analysis showed a tremendous agreement between the mass peaks and the cores of each subclusters intracluster medium.

As massive deposits of dark matter, gas, and stars, galaxy clusters are rich with interesting physics. What could be better? How about colliding galaxy clusters together at immense velocities. The Merging Cluster Collaboration is studying a sample of radio relic merging clusters. We are investigating a number of unique features that are enabled by colliding clusters such as properties of dark matter and charged particle acceleration.

PLCKG287 is dominated by a massive primary cluster with a number of smaller companions. It is a very unique radio relic cluster with two radio relics at vastly different distances from the center.