The starry, dusty origin of a galaxy cluster at z = 4!
We shed some light on the inner workings of an ultra-red, massive cluster core spotted at high redshift!
The Properties of Simulated Jellyfish
Astronomers use cosmological simulations to better understand a funny sort of satellite galaxy.
Searching for Protoclusters
How can we best find protoclusters, the progenitors of today’s galaxy clusters, in the early universe?
Baby Photos of a Galaxy Cluster
While ClJ1446 is smaller and less massive than most present-day clusters, it is probably very similar to what they looked like 10 billion years ago. Therefore, this work can help improve our understanding of how our nearby galaxy clusters likely evolved.
Groups and clusters: who turned off the AC?
Gas in clusters is predicted to cool quickly, but observations suggest otherwise. What prevents the gas from cooling? The authors explore the incidence and impact of heating by active galactic nuclei.
Citizen science: Observing dark worlds
Observing dark worlds is a public competition for improving algorithms to find dark matter halos in weak gravitational lensing maps. Today, we discuss citizen science projects and describe the results of the challenge.