IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Gamma-radiation from the galaxy cluster Abell 3376
Autor/es:
S.A. CORA, A.T. ARAUDO, G.E ROMERO
Lugar:
Heidelberg, Alemania
Reunión:
Simposio; 4th Heidelberg International Symposium on High Energy Gamma-Ray Astronomy; 2008
Resumen:
We estimate the radiation produced at gamma-ray energies by the cluster of galaxies Abell 3376, which is characterized by double opposite, giant ringlike radio structures. These radio relics support the presence of relativistic particles that are assumed to be accelerated by a diffusive shock mechanisms taking place in the cluster regions where these radio structures are observed. We calculate the spectral energy distribution resulting from the most relevant non-thermal processes (synchrotron radiation, inverse Compton scattering, relativistic Bremsstrahlung, and inelastic proton-proton collisions). From this model, we find that the major radiative component at high energies is inverse Compton scattering. Hadronic interactions would yield a minor contribution to the overall non-thermal emission, but would dominate at ultra-high energies. The cluster Abell 3376 might be detectable at gamma-rays by GLAST satellite and future planned Cherenkov arrays.