INVESTIGADORES
ROMERO Gustavo Esteban
artículos
Título:
Particle transport in magnetized media around black holes and associated radiation
Autor/es:
VIEYRO, F. L; ROMERO, G. E.
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2012 vol. 542 p. 1 - 13
ISSN:
0004-6361
Resumen:
Context. Galactic black hole coronae are composed of a hot, magnetized
plasma. The spectral energy distribution produced in this component of
X-ray binaries can be strongly affected by different interactions
between locally injected relativistic particles and the matter,
radiation and magnetic fields in the source. Aims: We study the
non-thermal processes driven by the injection of relativistic particles
into a strongly magnetized corona around an accreting black hole.
Methods: We compute in a self-consistent way the effects of relativistic
bremsstrahlung, inverse Compton scattering, synchrotron radiation, and
the pair-production/annihilation of leptons, as well as hadronic
interactions. Our goal is to determine the non-thermal broadband
radiative output of the corona. The set of coupled kinetic equations for
electrons, positrons, protons, and photons are solved and the resulting
particle distributions are computed self-consistently. The spectral
energy distributions of transient events in X-ray binaries are
calculated, as well as the neutrino production. Results: We show
that the application to Cygnus X-1 of our model of non-thermal emission
from a magnetized corona yields a good fit to the observational data.
Finally, we show that the accumulated signal produced by neutrino bursts
in black hole coronae might be detectable for sources within a few kpc
on timescales of years. Conclusions: Our work leads to
predictions for non-thermal photon and neutrino emission generated
around accreting black holes, that can be tested by the new generation
of very high energy gamma-ray and neutrino instruments.