[GA025] On the origin of gamma-ray emission from SNR CTB 37A with Fermi LAT
Supernova remnants are believed to be one of the major sources of Galactic cosmic rays. SNR CTB 37A is known to be interacting with several dense molecular clouds as traced by OH 1720 MHz maser. Radio and X-ray observations of the SNR confirm a mixed-morphology classification of the remnant. The TeV gamma ray source HESS J1714-385 is coincident with the SNR, though it’s still not clear whether the VHE gamma-ray emission is attributed to the SNR or a plausible PWN. In the present work, we use 7 years of Pass 8 Fermi-LAT data, with high capability to resolve gamma-ray sources, to perform a spectral study of the CTB 37A above 1 GeV. We then discuss several possible theoretical models to explain the broadband emission of the SNR and to disentangle the nature of the high-energy gamma-ray emission from the CTB 37A.