Abstract Details
| Name: Lab Saha Affiliation: Tata Institute of Fundamental Research Conference ID: ASI2015_661 Title : Radiative recombination structures in galactic supernova remnants Authors and Co-Authors : T. Ergin (1,2), A. Sezer (1,2), P. Majumdar (3), A. Chatterjee (3), A. Bayirli (2), E. N. Ercan (2) (1) TUBITAK Space Technologies Research Institute,Ankara, Turkey (2) Physics Department, Bogazici University, Istanbul, Turkey (3) Saha Institute of Nuclear Physics, Kolkata, India Abstract Type : Oral Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : The recent X-ray observations have revealed that some of the galactic gamma-ray-emitting supernova remnants (SNRs) have overionized plasmas. G31.9+0.0 (3C391) is one of the such galactic mixed-morphology SNRs observed in GeV gamma-rays by the Fermi Gamma Ray Space Telescope LAT (Fermi-LAT), as well as in the 0.3- 10 keV X-ray band by Suzaku. We analyzed the Suzaku data of 3C391 and we first discovered radiative recombination structures of silicon and sulfur from 3C391. We have also analysed gamma-ray data of 3C391 taken with Fermi-LAT and it was detected in GeV gamma rays with a significance of ∼18σ and we showed that the GeV emission is point-like in nature. The GeV gamma-ray spectrum was shown to be best explained by the decay of neutral pions assuming a broken power-law proton distribution. Here, we will discuss the possible origin of the of radiative recombination structures of two such SNRs including 3C391 and origin of gamma rays. |