TY  - JOUR
AU  - Cermeño, M.
AU  - Perez-Garcia, M. A.
AU  - Lineros, R. A.
PY  - 2018
DA  - 2018//
TI  - Enhanced neutrino emissivities in pseudoscalar-mediated dark matter annihilation in neutron stars
T2  - Astrophys. J.
JO  - Astrophysical Journal
SP  - 157
EP  - 9pp
VL  - 863
IS  - 2
PB  - Iop Publishing Ltd
KW  - dark matter
KW  - neutrinos
KW  - stars: neutron
AB  - We calculate neutrino emissivities from self-annihilating dark matter (DM) (chi) in the dense and hot stellar interior of a (proto)neutron star. Using a model where DM interacts with nucleons in the stellar core through a pseudoscalar boson (a) we find that the neutrino production rates from the dominant reaction channels chi -> nu(nu) over bar or chi chi -> aa, with subsequent decay of the mediator a -> nu(nu) over bar, could locally match and even surpass those of the standard neutrinos from the modified nuclear URCA processes at early ages. We find that the emitting region can be localized in a tiny fraction of the star (less than a few percent of the core volume) and the process can last its entire lifetime for some cases under study. We discuss the possible consequences of our results for stellar cooling in light of existing DM constraints.
SN  - 0004-637x
UR  - http://arxiv.org/abs/1705.03012
UR  - https://doi.org/10.3847/1538-4357/aad1ec
DO  - 10.3847/1538-4357/aad1ec
LA  - English
N1  - WOS:000442222700019
ID  - Cermeno_etal2018
ER  -