Neutrino pair annihilation ($nu{bar nu}to e^-e^+$) in the presence of quintessence surrounding a black hole. (arXiv:2012.09100v3 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Lambiase_G/0/1/0/all/0/1">G. Lambiase</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mastrototaro_L/0/1/0/all/0/1">L. Mastrototaro</a>
Quintessence fields, introduced to explain the speed-up of the Universe,
might affect the geometry of spacetime surrounding black holes, as compared to
the standard Schwarzschild and Kerr geometries. In this framework, we study the
neutrino pairs annihilation into electron-positron pairs ($nu{bar nu}to
e^-e^+$) near the surface of a neutron star, focusing, in particular, on the
Schwarzschild-like geometry in presence of quintessence fields. The effect of
the latter is to increase the minimum photon-sphere radius ($R_{ph}$),
increasing in such a way the maximum energy deposition rate near to $R_{ph}$.
The rate turns out to be several orders of magnitude greater than the rate
computed in the framework of General Relativity. These results might provide an
efficient mechanism for the generation of GRBs and lead to constraints on the
parameters of the quintessence model.
Quintessence fields, introduced to explain the speed-up of the Universe,
might affect the geometry of spacetime surrounding black holes, as compared to
the standard Schwarzschild and Kerr geometries. In this framework, we study the
neutrino pairs annihilation into electron-positron pairs ($nu{bar nu}to
e^-e^+$) near the surface of a neutron star, focusing, in particular, on the
Schwarzschild-like geometry in presence of quintessence fields. The effect of
the latter is to increase the minimum photon-sphere radius ($R_{ph}$),
increasing in such a way the maximum energy deposition rate near to $R_{ph}$.
The rate turns out to be several orders of magnitude greater than the rate
computed in the framework of General Relativity. These results might provide an
efficient mechanism for the generation of GRBs and lead to constraints on the
parameters of the quintessence model.
http://arxiv.org/icons/sfx.gif
