GRB emission in Neutron Star transitions

¹ Departament of Fundamental Physics and IUFFyM, University of Salamanca, Plaza de la Merced s/n 37008 Salamanca, Spain
² UPMC-CNRS, UMR 7095, Institut d’Astrophysique de Paris, 75014 Paris, France
³ Oxford Physics, University of Oxford, Keble Road OX1 3RH, Oxford, UK

Abstract

In this contribution we briefly introduce a mechanism for short gamma ray burst emission different from the usually assumed compact objects binary merger progenitor model. It is based on the energy release in the central regions of neutron stars. This energy injection may be due to internal self-annihilation of dark matter gravitationally accreted from the galactic halo. We explain how this effect may trigger its full or partial conversion into a quark star and, in such a case, induce a gamma ray burst with isotropic equivalent energies in agreement with those measured experimentally. Additionally, we show how the ejection of the outer crust in such events may be accelerated enough to produce Lorentz factors over those required for gamma ray emission.