In the recent years a new window on the universe has been opened by ground based and space telescopes that survey the sky by detecting high energy photons, which have energies from a few, up to hundreds of gig electron volts (GeV). Because of the poor angular resolution of the gamma-ray telescopes relative to that of telescopes for longer wavelengths, the ultimate nature of a large fraction of the thousands of sources of gamma-rays observed so far remains unknown. Compact astrophysical objects are among those high energy sources, and recently were discovered in the Milky Way sources that belong to a particular class called “Compact Gamma-Ray Binaries”. They are neutron stars or black holes orbiting around massive stars 1,2 . The challenges are: 1) to identify the gamma-ray source with a source observed at other wavelengths, 2) determine the properties of the binary system, and 3) understand the physical mechanisms by which gamma-rays are produced. In the Milky Way have been unambiguously identified only a handful of compact binaries radiating at gamma-rays (Cygnus X-3; Cygnus X-1; PSR B1259-63; LSI +61° 303; LS 5039; HESS J0632+057; 1FGL J1018.6-5856). However, from models of the evolution of massive stellar binaries it is inferred that in the Galaxy there should be a much larger population of Gamma-ray Binaries. © 2013 Sociedade Brasileira de Fisica. All rights reserved.
Documento: | Conferencia |
Título: | Compact gamma-ray binaries |
Autor: | Mirabel, I.F. |
Filiación: | IAFE-Conicet, Buenos Aires, Argentina IRFU-CEA-Saclay, France |
Palabras clave: | Cosmic rays; Cosmology; Galaxies; Stars; Angular resolution; Astrophysical objects; Binary systems; Gamma ray sources; Gamma ray telescope; High energy photons; High-energy sources; Physical mechanism; Gamma rays |
Año: | 2013 |
Volumen: | 2013-October |
Título revista: | 33rd International Cosmic Rays Conference, ICRC 2013 |
Título revista abreviado: | Proc. Int. Cosmic Rays Conf., ICRC |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97885890_v2013-October_n_p_Mirabel |