Study of gamma-ray loud binaries in the Fermi era

TL;DR

This paper analyzes Fermi gamma-ray data of gamma-ray loud binaries, constraining proton energies and neutrino signals, and discusses prospects for detecting gamma-ray emissions during specific binary events.

Contribution

It provides new constraints on proton energies and neutrino emissions in gamma-ray binaries based on Fermi observations, and explores detection prospects during binary periastron passages.

Findings

Detection of GeV spectral cut-off constrains proton maximum energy.

GeV data impose limits on neutrino flux and lightcurve.

Discussion of potential gamma-ray detection during binary periastron.

Abstract

We discuss Fermi observations of gamma-ray loud binaries. We show that within hadronic model of activity of LSI +61 303, detection of cut-off in the GeV spectrum constrains maximal energy of the primary protons. In this way, the GeV gamma-ray data impose constraint on the expected neutrino signal (spectrum and lightcurve) from the source. We also briefly discuss perspectives of GeV band detection of PSR B1259-63 during the 2010 periastron passage.