Search for Very High-energy Gamma Rays from the Northern Fermi Bubble Region with HAWC


Abstract:

We present a search for very high-energy gamma-ray emission from the Northern Fermi Bubble region using data collected with the High Altitude Water Cherenkov gamma-ray observatory. The size of the data set is 290 days. No significant excess is observed in the Northern Fermi Bubble region, so upper limits above 1 TeV are calculated. The upper limits are between and . The upper limits disfavor a proton injection spectrum that extends beyond 100 TeV without being suppressed. They also disfavor a hadronic injection spectrum derived from neutrino measurements.

Año de publicación:

2017

Keywords:

  • Galaxy: structure
  • Galaxy: general
  • gamma rays: diffuse background
  • astroparticle physics

Fuente:

scopusscopus