2nd Abstract
| Title (2nd abstract) | Radio Observations of the Pulsar Wind Nebula HESS J1303−631 with ATCA |
| First Author (2nd abstract) | Iurii Sushch |
| Affiliation (2nd abstract) | North-West University, Potchefstroom, South Africa |
| Additional Authors (2nd abstract) | Igor Oya, Ullrich Schwanke, Simon Johnston, Matthew Dalton |
| Presentation options (2nd abstract) | |
| Session (2nd abstract) | 3. Pulsar winds nebulae (including Crab flares) |
| 2nd Abstract | Based on its energy-dependent morphology the initially unidentified very high energy (VHE; E > 100 GeV) gamma-ray source HESS J1303−631 was recently associated with the pulsar PSR J1301−6305. Subsequent detection of X-ray and GeV counterparts further support the identification of the H.E.S.S source as an evolved pulsar wind nebula (PWN). Recent radio observations of the PSR J1301−6305 region with ATCA dedicated to search for the radio counterpart of HESS J1303-631 are reported here. Observations at 5.5 GHz and 7.5 GHz do not reveal any extended emission associated with the pulsar. The analysis of the archival 1.384 GHz and 2.368 GHz data also does not show any significant emission. The 1.384 GHz data reveal a hint of an extended shell-like emission in the same region which might be a supernova remnant (SNR). The implications of the non-detection at radio wavelengths on the nature and evolution of the PWN, as well as the possibility of the SNR candidate being a birth-place of PSR J1301−6305 are discussed. |
Account
| First Name | Iurii |
| Last Name | Sushch |
| Institution | North-West University |
| Country | South Africa |
1st Abstract
| Title (1st Abstract) | Deep H.E.S.S. Observations of the Supernova Remnant RX J0852.0-4622 |
| First Author | Iurii Sushch |
| Affiliation | North-West University, Potchefstroom, South Africa |
| Additional Authors | Manuel Paz Arribas, Nukri Komin, Ullrich Schwanke for the H.E.S.S. Collaboration |
| Presentation options | |
| Session | 1. Radiation studies from gamma-rays to radio in Galactic and Extragalactic SNRs |
| 1st Abstract | The largest TeV source, RX J0852.0-4622 (Vela Jr.), is one of the few supernova remnants (SNRs) with well resolved shell-like morphology at very-high-energy (VHE; E>100 GeV) gamma-rays. Strong non-thermal emission across the electromagnetic spectrum from radio to VHE gamma-rays, young age and proximity of the remnant makes it one of the prime objects for the study of particle acceleration aiming to test the paradigm of SNRs being sources of Galactic cosmic rays. Here we present deep H.E.S.S. observations of RX J0852.0-4622 with roughly doubled exposure comparing to previously published results. Improved statistics together with new analysis techniques result in a firm determination of the cut-off in the gamma-ray spectrum and allow the spatially resolved spectroscopy studies. A smooth connection of the H.E.S.S. spectrum to the spectrum at GeV energies as reported by Fermi/LAT provides an exciting opportunity to recover the present-time parent particle population in both leptonic and hadronic scenarios directly from the gamma-ray data alone. These new observations provide us a deeper insight and better understanding of the physical processes in SNRs. |