Searching for Decaying Axionlike Dark Matter from Clusters of Galaxies
Abstract
We constrain the lifetime of radiatively decaying dark matter in clusters of galaxies inspired by generic Kaluza-Klein axions, which have been invoked as a possible explanation for the solar coronal x-ray emission. These particles can be produced inside stars and remain confined by the gravitational potential of clusters. By analyzing x-ray observations of merging clusters, where gravitational lensing observations have identified massive, baryon poor structures, we derive the first cosmological lifetime constraint on this kind of particles of τ≳1023sec.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2007
- DOI:
- 10.1103/PhysRevLett.99.131301
- arXiv:
- arXiv:astro-ph/0703342
- Bibcode:
- 2007PhRvL..99m1301R
- Keywords:
-
- 95.35.+d;
- 14.80.Mz;
- 95.85.Nv;
- 98.65.Cw;
- Dark matter;
- Axions and other Nambu-Goldstone bosons;
- X-ray;
- Galaxy clusters;
- Astrophysics;
- High Energy Physics - Phenomenology
- E-Print:
- Submitted to PRL, 4 pages, 3 figures