Conveners
Parallel 2: SNR/PWNe
- Pieter Meintjes (University of the Free State)
RX J1713.7-3946 is the brightest TeV supernova remnant, so it is an important test case for cosmic-ray acceleration. The mainstream view is that the SNR developed into the tenuous wind of its high-mass progenitor and now reaches a shell of denser gas around. The gamma rays are well correlated with the X-rays (synchrotron), but the correlation is very non linear (approximately Fgamma as...
While gamma-ray instruments have notoriously poorer imaging quality than most instruments used at lower energies, dedicated techniques have been developed to push the angular resolution to the limits. Many SNR and plerions have been spatially resolved in the VHE band with the HESS array. We will present matching studies with LAT data, compare the astrometric and morphological results in...
Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported discovery of 12 ultrahigh-energy (UHE; ε≥100 TeV) gamma-ray sources located in the Galactic plane. Few of these UHE gamma-ray emitting regions are in spatial coincidence with pulsar wind nebula (PWN) objects. We consider a sample of five sources; two of them are LHAASO sources (LHAASO J1908+0621 and LHAASO J2226+6057)...
Supernova remnants are known to accelerate cosmic rays from the detection of non-thermal emission of radio waves, X-rays, and gamma rays. The presence of cut-offs in the gamma-ray spectra of several young SNRs led to the idea that the highest energies might only be achieved during the very initial stages of a remnant’s evolution. Unfortunately, the gamma-ray luminosity is assumed to peak in...
The very-high-energy gamma-ray emission observed from a number of Supernova remnants (SNRs) indicates particle acceleration to high energies at the shock of the remnants and a potentially significant contribution to Galactic cosmic rays. It is, however, difficult to determine whether protons (through hadronic interactions and subsequent pion decay) or electrons (through inverse Compton...
In this work, photometric and spectroscopic analyses of a very low-luminosity Type IIb supernova (SN) 2016iyc have been performed. SN 2016iyc lies near the faintest end among the distribution of similar supernovae (SNe). Given lower ejecta mass ($M_{\rm ej}$) and low nickel mass ($M_{\rm Ni}$) from the literature, combined with SN 2016iyc lying near the faintest end, one-dimensional stellar...
