XMM-Newton and Fermi/LAT view on the supernova remnant 3C434.1
Abstract
We report on XMM-Newton observations of the supernova remnant (SNR) 3C434.1 (G94.0+1.0), the first in X-rays since the ROSAT era. Our analysis confirms the thermal origin of the observed extended X-ray emission, whose morphology appears more complex than previously reported. In particular, part of the shell shows a significantly harder spectrum which is consistent with a power law, and it is, therefore, likely of non-thermal origin. Motivated by these finding, we revisited the GeV observations of the field taken with the Fermi observatory. A significant excess associated with the remnant was detected, which is likely associated with non-thermal X-ray emission from part of the shell. The analysis of the Fermi data resulted in the serendipity discovery of GeV emission from the nearby SNR G093.7-00.2. Finally, we searched for a possible compact remnants within the shell, however, no obvious candidates could be identified due to the fairly large positional uncertainties.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 2019
- DOI:
- 10.1051/0004-6361/201935487
- Bibcode:
- 2019A&A...631A.179D
- Keywords:
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- ISM: supernova remnants;
- stars: neutron;
- gamma rays: general