Heidelberg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

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.