Speaker
Mrs
Martina Cardillo
(INAF-IAPS & Università di Roma Tor Vergata)
Description
The SNRW44 plays a crucial role in our understanding of the Cosmic Ray origin.
Recently, AGILE and Fermi-LAT data have determined, for the first time in a supernova remnant, that the gamma-ray emission from W44 can be attributed to accelerated proton/ions.
We present new W44 AGILE data and compare them with the recent Fermi data, in the light of new NANTEN2 telescope CO results. Our analysis provides strong constraints for the SNR complex environment: high density (n>200 cm^-3), high magnetic field on large scales (B~10^2 microG) and a proton spectral index steeper than in other middle-aged SNRs (p=3.2).
The W44 characteristics are challenging for all theoretical models.
Primary author
Mrs
Martina Cardillo
(INAF-IAPS & Università di Roma Tor Vergata)
Co-authors
Dr
Andrea Giuliani
(INAF/IASF- Milano, I-20133, Milano, Italy)
Prof.
Marco Tavani
(INAF/IAPS & Università di Roma Tor Vergata)
