Abstract Details
| Name: Nayana A J Affiliation: NCRA-TIFR Conference ID: ASI2016_462 Title : Discovery of 325 MHz and 610 MHz radio counterpart of Supernova Remnant HESS J1731-347 a.k.a SNR G353.6-0.7 Authors and Co-Authors : Poonam Chandra (NCRA-TIFR) Subhashis Roy (NCRA-TIFR) Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : Supernova shocks are suggested as probable candidates of cosmic ray acceleration sites, through a mechanism called Diffusive Shock Ac- celeration (DSA). A TeV source associated with Supernova Remnant (SNR) becomes an interesting laboratory in this context. HESS J1731-347 is a TeV source first seen in HESS galactic plane survey with unidentified counter- parts and later had a likely association with a SNR G353.6-0.7. So far there are only five SNRs which has significant resolved shell type morphology at gamma ray energies and HESS J1731-347 is the latest among them. This source is an ideal candidate to study the particle acceleration mechanism in SNR shocks. Studying the radio morphology of the remnant and constrain- ing the spectral index is crucial to understand the acceleration mechanism. We observe the remnant using Giant Metre Wave Radio Telescope (GMRT) and discover the 325 MHz and 610 MHz counterpart. This is the first detec- tion of G353.6-0.7 at these low frequencies. The complete shell is revealed in the GMRT map and we compare the resolved shell structure with the faint structures seen in other galactic plane surveys. We compare the GMRT maps with various dust maps and further confirm the likely association of HESS J1731-347 with the radio shell. The radio maps are compared with the HESS maps to see the correlation between high energy emission with radio emission. We find that the spectral index at the filaments are consistent with the non thermal feature as expected. |