Looking for a dark matter needle in an X-ray stack
Can an unexplained signal found inside multiple galaxy clusters tell us something about dark matter? Find out about a tantalising indirect detection by X-ray astronomers.
Reading the Epic of Reionization
Observations of dim galaxies lensed by foreground clusters provides a way of measuring the progression of reionization.
Old but gold: a huge primordial proto-cluster
In today’s posts we discuss observations of a super dense, massive and old proto-cluster and what it means to the Universe’s history
What is the Most Massive Object in the Universe?
Trying to find the most massive galaxy cluster in the night sky can be hard. Comparing predictions of these masses to observed clusters? Even harder. An insight into the world of Halo Mass Functions and their tail-ends.
What’s your Cosmology? Ask CMB Maps.
Today’s paper takes you back to the time when anisotropies in the Cosmic Microwave Background first shaped Observational Cosmology into the field it is today.
Wobbling Galaxies: Evidence of Dark Matter Interactions?
Do wobbling galaxies at the center of galaxy clusters indicate interactions between dark matter particles?