Speaker
Description
Promising regions within the Galactic plane may offer more insight on the transition from younger to older pulsar wind nebulae (PWNe) evolution, as the observed very-high-energy emission provide constrains on their morphology and physical mechanisms at play. In particular, we focus on the 312° galactic longitude field of two degrees containing five powerful pulsars. Their rotational energies range from ${10}^{35}$ to ${10}^{37}$ erg.${s}^{-1}$ for ages between 13.6 and 62.8 kyr. Extended emission has been recently probed with H.E.S.S. in their vicinity, notably around the pulsar PSR J1413-6205 in the TeV domain.
We processed 124 hours of H.E.S.S observations with an analysis algorithm improving background fitting for the study of extended diffuse sources. We applied a three-dimensional likelihood analysis technique to model the different sources in the region of interest using a configuration optimized to enhance the collection area at the highest energies.
This presentation will focus on the discussion of new detections in the context of PWN-candidate searches and on the understanding of systems that might be transitioning from a PWN to a TeV gamma-ray halo.
