Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 45: Gamma Astronomy 2
T 45.1: Vortrag
Dienstag, 22. März 2022, 16:15–16:30, T-H30
The Crab pulsar wind nebula in high-energy gamma-rays and its flaring emission — •Michelle Tsirou1, Brian Reville1, Emma de Oña-Wilhelmi2, Gwenaël Giacinti1, and John Kirk1 — 1MPIK, Heidelberg, Germany — 2DESY, Berlin-Zeuthen, Germany
The Crab nebula system is one of the brightest gamma-ray sources in the Milky Way, extensively observed across the electromagnetic spectrum. Recent studies purport intermittent flaring events deviating from the continuous flux associated with its synchrotron spectrum below a few hundreds of MeV, straining the theoretical synchrotron burn-off limit in these energy ranges. By analysing available Fermi-LAT data across a thirteen-year-long monitoring, we study the energy-dependence of its flaring behaviour in a few hundred MeV up to a few GeV energy ranges. We explore acceleration mechanisms prone to explain the variability of the observed emission and discuss its implication on our current understanding of this extreme system.