Could galaxy cluster collisions be used as dark matter detectors?

[Admin]

Particle accelerators like the Large Hadron Collider have failed to turn up potential dark matter candidates, but could galaxy cluster smashes be used as cosmic dark matter colliders?

Could galaxy cluster collisions be used as dark matter detectors? : Read more

 

[Torbjorn Larsson]

The method is best for one class of dark matter models, though with much larger statistics - if we can get to it - the method can see other classes as well:

a large class containing a dark-sector analogue of the strong force

At lower cross-sections, either simulation resolution, noise, or cosmological effects (see Section 4.2) inhibit simulated values of β∥ reaching zero. Such tight constraints would require observations of approximately three times more clusters than listed in Table 3.

Meanwhile, head on views of collisions have now revealed that normal matter interacts via electromagnetism early on [https://www.caltech.edu/about/news/...ormal-matter-in-mega-galaxy-cluster-collision], making such cluster's collision speeds more consistent with LCDM cosmology [https://bigthink.com/starts-with-a-bang/dark-matter-bullet-cluster/].