Abstract
view Abstract Citations (19) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Problems of Ultra--High-Energy Particle Acceleration in Cygnus X-3: A Critical Reappraisal Mitra, Abhas Abstract All the major viable acceleration mechanisms suggested so far in order to explain the energy of the gamma-rays observed from Cygnus X-3 are critically reviewed. It is argued that Cyg X-3 must be an accretion-fed strong X-ray binary with negligible orbital eccentricity and cannot contain a young active pulsar. It is shown that, for reasonable assumptions, the accretion disk unipolar inductor model can be ruled out as the gamma-ray source in Cyg X-3. It is confirmed that, within the framework of standard magnetospheric theories, there is little scope for extremely efficient diffusive acceleration at the accretion shock. It is concluded that the basic 'beam-dumping' model cannot be applicable to Cyg X-3, and that the proton luminosity requirements of the source can be met if the TeV-PeV gamma-ray flux is generated by photomeson reaction on its strong X-ray field. Publication: The Astrophysical Journal Pub Date: March 1991 DOI: 10.1086/169821 Bibcode: 1991ApJ...370..345M Keywords: Energetic Particles; Gamma Ray Astronomy; Particle Acceleration; Pulsars; X Ray Binaries; Accretion Disks; Computational Astrophysics; Shock Waves; Stellar Evolution; Stellar Luminosity; Stellar Mass Accretion; Astrophysics; GAMMA RAYS: GENERAL; PARTICLE ACCELERATION; PULSARS; RADIATION MECHANISMS; STARS: ACCRETION; STARS: INDIVIDUAL CONSTELLATION NAME: CYGNUS X-3; X-RAYS: BINARIES full text sources ADS | data products SIMBAD (5)
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