@conference {21750,
	title = {Early-time signatures of γ-ray emission from supernovae in dense circumstellar media},
	year = {2016},
	month = {2016/06/1},
	pages = {139},
	abstract = {We present our results on the γ-ray emission from interaction-powered supernovae (SNe), a recently discovered SN type that is suggested to be surrounded by a circumstellar medium (CSM) with densities 10^7-10^12~ cm^-3. Such high densities favor inelastic collisions between relativistic protons accelerated in the SN blast wave and CSM protons and the production of γ-ray photons through neutral pion decays. Using a numerical code that includes synchrotron radiation, adiabatic losses due to the expansion of the source, photon-photon interactions, proton-proton collisions and proton-photon interactions, we calculate the multi-wavelength non-thermal photon emission soon after the shock breakout and follow its temporal evolution until 100-1000 days. Focusing on the γ-ray emission at \&gt;100 MeV, we show that this could be detectable by the Fermi-LAT telescope for nearby (\&lt;10 Mpc) SNe with dense CSM (\&gt;10^11 cm^(-3)).},
	keywords = {Astrophysics - High Energy Astrophysical Phenomena},
	url = {https://ui.adsabs.harvard.edu/abs/2016sros.confE.139K},
	author = {Kantzas, Dimitrios and Petropoulou, Maria and Mastichiadis, Apostolos}
}
