dc.creator | Baushev, A. N. | |
dc.date.accessioned | 2016-06-14T13:41:42Z | |
dc.date.available | 2016-06-14T13:41:42Z | |
dc.date.created | 2016-06-14T13:41:42Z | |
dc.date.issued | 2016 | |
dc.identifier | Journal of Cosmology and Astroparticle Physics, 2016 | |
dc.identifier | DOI: 10.1088/1475-7516/2016/01/018 | |
dc.identifier | https://repositorio.uchile.cl/handle/2250/138793 | |
dc.description.abstract | A very general cosmological consideration suggests that, along with galactic dark
matter halos, much smaller dark matter structures may exist. These structures are usually
called ‘clumps’, and their mass extends to 10−6M⊙ or even lower. The clumps should give
the main contribution into the signal of dark matter annihilation, provided that they have
survived until the present time. Recent observations favor a cored profile for low-mass astrophysical
halos. We consider cored clumps and show that they are significantly less firm
than the standard NFW ones. In contrast to the standard scenario, the cored clumps should
have been completely destroyed inside ∼ 20 kpc from the Milky Way center. The dwarf
spheroidals should not contain any dark matter clumps. On the other hand, even under the
most pessimistic assumption about the clump structure, the clumps should have survived
in the Milky Way at a distance exceeding 50 kpc from the center, as well as in low-density
cosmic structures. There they significantly boost the dark matter annihilation. We show
that at least 70% of the clumps endured the primordial structure formation should still exist
untouched in the present-day Universe. | |
dc.language | en | |
dc.publisher | IOP Publishing | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | |
dc.subject | Cosmic ray theory | |
dc.subject | Supersymmetry and cosmology | |
dc.subject | Particle physics - cosmology connection | |
dc.subject | Dark matter theory | |
dc.title | Can the dark matter annihilation signal be significantly boosted by substructures? | |
dc.type | Artículo de revista | |