2016/09/12 by E. Egron, A. Pellizzoni, Egron, E. +27
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Radio Astronomy Observations and Technology #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1609.03882
3 pages, 1 figure, Conference: "Supernova Remnants: An Odyssey in Space after Stellar death"
arxiv created 2016/09/12 · openalex publication_date 2016/09/12 · arxiv updated 2016/09/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the frame of the Astronomical Validation activities for the 64m Sardinia Radio Telescope, we performed 5-22 GHz imaging observations of the complex-morphology supernova remnants (SNRs) W44 and IC443. We adopted innovative observing and mapping techniques providing unprecedented accuracy for single-dish imaging of SNRs at these frequencies, revealing morphological details typically available only at lower frequencies through interferometry observations. High-frequency studies of SNRs in the radio range are useful to better characterize the spatially-resolved spectra and the physical parameters of different regions of the SNRs interacting with the ISM. Furthermore, synchrotron-emitting electrons in the high-frequency radio band are also responsible for the observed high-energy phenomenology as -e.g.- Inverse Compton and bremsstrahlung emission components observed in gamma-rays, to be disentangled from hadron emission contribution (providing constraints on the origin of cosmic rays).