Supernova Remnants: An Odyssey in Space after Stellar death

Supernova Remnants: An Odyssey in Space after Stellar death

Supernova Remnants: An Odyssey in Space after Stellar death


1st Abstract

Title (1st Abstract)

Modelling high-resolution spatially-resolved SNR spectra with the Sardinia Radio Telescope

First Author

Sara Loru


INAF- Osservatorio Astronomico di Cagliari

Additional Authors

Alberto Pellizzoni (INAF-OAC), Elise Egron (INAF-OAC), Noemi Iacolina (INAF-OAC), Simona Righini (INAF-IRA), Matteo Bachetti (INAF-OAC), Raimondo Concu (INAF-OAC), Marco Marongiu (INAF-OAC), Andrea Melis (INAF-OAC), Sara Mulas (University of Cagliari), Giulia Murtas (University of Cagliari), Maura Pilia (INAF-OAC), Roberto Ricci (INAF-IRA), Alessio Trois (INAF-OAC)

Presentation options



1. Radiation studies from gamma-rays to radio in Galactic and Extragalactic SNRs

1st Abstract

Supernova Remnants exhibit spectra typically featured by synchrotron emission mostly arising from the relativistic emitting electrons in the radio band and high-energy emission from both leptonic processes like Bremsstrahlung and Compton Inverse produced by the radio-electrons
interacting with ambient photons, and hadronic process of pi0 mesons decay which is a direct signature of Cosmic Rays accelerated in Supernova Remnants. Single particle population models based on integrated radio fluxes are too simplistic in order to describe SNR phenomenology. On the other hand, spatially-resolved high-frequency radio data are often lacking. Thanks to radio imaging observations obtained in three frequency bands (1.4, 7, 22 GHz) with the Sardinia Radio Telescope (, we can model separately different SNR regions. Indeed, in order to disentangle interesting and peculiar hadron contributions in the high-energy spectra and better constrain SNRs as Cosmic Rays emitters, it is crucial to fully constrain lepton contributions first through radio-observed parameters.
In particular, the Bremsstrahlung and Inverse Compton bumps observed in gamma-rays are typically bounded to synchrotron spectral slope and cut-off in the radio domain, associated with different SNR regions and electron populations.