Conveners
Stellar sources (galactic and extragalactic) II
- Andrzej Zdziarski (N. Copernicus Astronomical Center, Warsaw)
Gamma-ray binaries, systems containing interacting compact objects whose radiative output is dominated by gamma-ray emission, are evolutionary precursors of high-mass X-ray binaries, and tens of these objects had been predicted to exist in our Galaxy. We have been searching for new members of this class via the detection of periodic modulation of LAT light curves, with extensive...
Supernova remnant (SNR) N132D, located in the Large Magellanic Cloud, represents a unique opportunity for the study of gamma-ray emission from shock-accelerated cosmic rays (CRs) in another galaxy since it stands as the first and only extra-galactic SNR detected in gamma-rays. N132D is one of the brightest SNRs in the local Universe in the X-ray, infrared and radio bands, and it has also been...
SNRs are considered to be the main sites in the Milky Way for producing cosmic rays with energies up to a few 10^15 eV. Among them, shell-like SNRs exhibit a morphology spatially coincident with the shock front of the SNR and are of great interest in the context of particle acceleration. Their common characteristics are a young age, a large angular size and TeV emission highly correlated with...
The supernova remnants Kes 73 and Kes 79 can deposit a large amount of energy to their surroundings and are potentially responsible for particle acceleration. Using the data taken with the Fermi Large Area Telescope (LAT), we confirmed the presence of extended sources which are spatially associated with these two supernova remnants. Kes 73 shows intense emission from 100 MeV to $>$100 GeV, and...
Supernova remnants (SNRs), pulsar wind nebulae (PWNe) and pulsars are the usual suspects to accelerate the bulk of cosmic rays in our Galaxy. In those objects the gamma-ray emission allows us to probe the population of high-energy particles and in particular the population of accelerated hadrons radiating through the pion-decay mechanism. In case of composite SNRs, both the SNR shell and the...
A number of middle-aged SNRs with molecular clouds (MCs) emit GeV gamma-rays originating from accelerated protons. About half of GeV SNRs also have recombining plasma (RP; the plasma with ionization temperatures that are higher than electron temperatures), implying rapid cooling of the electrons. These facts indicate thermal plasma can be the key to understand the escaping process of...
