TY  - JOUR
AU  - Moline, A.
AU  - Schewtschenko, J. A.
AU  - Palomares-Ruiz, S.
AU  - Boehm, C.
AU  - Baugh, C. M.
PY  - 2016
DA  - 2016//
TI  - Isotropic extragalactic flux from dark matter annihilations: lessons from interacting dark matter scenarios
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 069
EP  - 23pp
VL  - 08
IS  - 8
PB  - Iop Publishing Ltd
KW  - dark matter simulations
KW  - dark matter theory
KW  - gamma ray theory
AB  - The extragalactic gamma-ray and neutrino emission may have a contribution from dark matter (DM) annihilations. In the case of discrepancies between observations and standard predictions, one could infer the DM pair annihilation cross section into cosmic rays by studying the shape of the energy spectrum. So far all analyses of the extragalactic DM signal have assumed the standard cosmological model (ACDM) as the underlying theory. However, there are alternative DM scenarios where the number of low-mass objects is significantly suppressed. Therefore the characteristics of the gamma-ray and neutrino emission in these models may differ from ACDM as a result. Here we show that the extragalactic isotropic signal in these alternative models has a similar energy dependence to that in ACDM, but the overall normalisation is reduced. The similarities between the energy spectra combined with the flux suppression could lead one to misinterpret possible evidence for models beyond ACDM as being due to CDM particles annihilating with a much weaker cross section than expected.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1602.07282
UR  - https://doi.org/10.1088/1475-7516/2016/08/069
DO  - 10.1088/1475-7516/2016/08/069
LA  - English
N1  - WOS:000389859100053
ID  - Moline_etal2016
ER  -