Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.312...50h&link_type=abstract
Nature (ISSN 0028-0836), vol. 312, Nov. 1, 1984, p. 50, 51.
Astronomy and Astrophysics
Astronomy
95
Binary Stars, Cygnus Constellation, Gamma Ray Astronomy, Particle Acceleration, Pulsars, X Ray Sources, Cosmic Rays, Electron Photon Cascades, Proton Beams, Stellar Envelopes
Scientific paper
Cygnus X-3 seems to be a binary system that includes a compact object, but it is unusual in being enshrouded in gas, in displaying occasional huge outbursts and in emitting much more energy above 1011eV than in the keV X-ray region. If the compact object is a pulsar, the ultra-high-energy photons can be products of an accelerated beam of protons striking the companion's atmosphere. It is noted here that a roughly monoenergetic spray of ≡1017eV protons, generating an electron-photon cascade in the environs of the companion star, best accounts for all photons above a few GeV, and might generate the gas shroud, as beam energy deposition inside the star could lift off a thick layer of matter to generate a fountain under the pulsar.
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