2005ApJ...631..466B -
Astrophys. J., 631, 466-470 (2005/September-3)
TeV neutrinos from microquasars in compact massive binaries.
BEDNAREK W.
Abstract (from CDS):
We consider a compact binary system in which a Wolf-Rayet star supplies matter to a stellar mass black hole or a neutron star. This matter forms an accretion disk that ejects a jet like those observed in Galactic microquasars. A part of the jet kinetic energy, typically ∼10%, can be transferred to relativistic nuclei. These nuclei lose nucleons as a result of the photodisintegration process in collisions with thermal photons from the accretion disk and the massive star. As a result of the head-on photon-nucleus collisions, most of the neutrons released from the nuclei move toward the surface of the accretion disk and/or the massive star producing neutrinos in collisions with the matter. We calculate the spectra of muon neutrinos and expected neutrino event rates for a 1 km3 neutrino detector of the IceCube type from a microquasar inside our Galaxy by applying, as an example, the parameters of the Cyg X-3 binary system. Such a model predicts up to several neutrino events per kilometer3 per year from Cyg X-3, provided that nuclei are accelerated to the Lorentz factors above 106 with a power-law spectrum with an index close to 2.
Abstract Copyright:
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Journal keyword(s):
ISM: Cosmic Rays - Neutrinos - Radiation Mechanisms: Nonthermal - Stars: Wolf-Rayet - X-Rays: Binaries - X-Rays: General - X-Rays: Individual: Constellation Name: Cygnus X-3
Simbad objects:
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