Spin light of neutrino in astrophysical environmentsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 26 января 2018 г.
Аннотация:The spin light of neutrino (SLν) is a new possible mechanism of electromagnetic
radiation by a massive neutrino (with a nonzero magnetic moment) moving in media. Since
the prediction of this mechanism, the question has been debated in a number of publications
as whether the effect can be of any significance for realistic astrophysical conditions. Although
this effect is strongly suppressed due to smallness of neutrino magnetic moment, for ultrahigh
energy neutrinos (PeV neutrinos recently observed by the IceCube collaboration, for
instance) the SLν might be of interest in the case of neutrinos propagating in dense matter.
An advanced view on the SLν in matter is given, and several astrophysical settings (a
neutron star, supernova, Gamma-Ray Burst (GRB), and relic neutrino background) for which
the effect can be realized are considered. Taking into account the threshold condition and
also several competing processes, we determine conditions for which the SLν mechanism is
possible. We conclude that the most favorable case of the effect manifestation is provided
by ultra dense matter of neutron stars and ultrahigh energy of the radiating neutrino, and
note that these conditions can be met within galaxy clusters. It is also shown that due to
the SLν specific polarization properties this electromagnetic mechanism is of interest in the
connection with the observed polarization of GRB emission.