A measurable fraction (∼8 per cent) of recently discovered arcmin-size circular diffuse radio sources termed as odd radio circles or ORCs can be supernovae remnants in the intragroup medium, within the Local Group and its ...

Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported the discovery of 12 ultrahigh-energy (UHE; ε ≥ 100 TeV) gamma-ray sources located in the Galactic plane. A few of these UHE gamma-ray emitting ...