12-20 July 2017
BEXCO
Asia/Seoul timezone
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Contribution

BEXCO - Room F(201/202/203/204)

[GA254] Observation of Radio Galaxies with HAWC

Speakers

  • Daniel AVILA

Primary authors

  • Daniel AVILA (Institute of Physics, National Autonomous University of Mexico)

Co-authors

  • Magdalena GONZÁLEZ (Institute of Astronomy, National Autonomous University of Mexico)
  • Rubén ALFARO (Institute of Physics, National Autonomous University of Mexico)
  • Antonio GALVÁN (Institute of Astronomy, National Autonomous University of Mexico)
  • Marc KLINGER (RWTH, Aachen University/National Autonomous University of Mexico)
  • Nissim FRAIJA (Institute of Astronomy, National Autonomous University of Mexico)

Description

The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory is an extensive air shower array located in Puebla, Mexico. The closest three radio galaxies within the HAWC field of view, NGC 1275, PKS 0625-35 and M87, have been detected in very high energies. In this work we report upper limits on the TeV emission of these three radio galaxies, being M87 the most interesting because it has shown fast variability and is the best candidate to be observed for its closeness to the Earth. At a distance of 16 Mpc, M87 is a supergiant elliptical galaxy located in the Virgo Cluster that has been observed from radio wavelengths to TeV γ-rays. Although a single-zone synchrotron self-Compton model has been successfully used to explain the spectral energy distribution of this source up to a few GeV, the γ-ray spectrum at TeV has been interpreted within different theoretical models. We discuss the implications of these upper limits on the radiation mechanisms at very high energies, as well as the recent results on the searches for point sources by the IceCube neutrino telescope .