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.
In the study of structure formation in the universe, the ‘missing satellite galaxies’ problem is said to be almost solved. Is today’s paper the final nail in the coffin?
Will low mass dark matter halos discovered in gravitational lenses tell us about the nature of dark matter?
We understand cosmology by building models that we can trace back through time, but nothing about these models limits them to the past. As the universe expands, faster and faster pushed by dark energy, when does that acceleration outstrip gravity? And when do the last stars form?
Will future gamma-ray space telescopes be able to detect gamma-rays coming from invisible dark matter halos?
There’s lots of them out there. The answer to some of the mysteries of the universe could be hidden in their numbers.