High-Energy Gamma-Ray Emission from Pulsars, Pulsar Winds and Plerions

Astronomy and Astrophysics – Astronomy

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Gamma-Ray Sources, Gamma-Ray Bursts, Pulsars, Mass Loss And Stellar Winds

Scientific paper

Rotation-powered pulsars and the interaction with their environments are expected to provide sources of high-energy gamma-ray emission. I will discuss the latest developments in models for pulsed emission, including the slot gap extension of the polar cap model and outer gap models, and the predicted emission at GeV-TeV energies. Millisecond pulsars appear to be especially promising sources at energies around 50-100 GeV. Magnetically-powered pulsars (magnetars) have recently been discovered to have hard, non-thermal components in their pulsed spectra, and may be a source of high-energy γ-rays as well. There have also been a number of new pulsars and their nebulae discovered in the X-ray band over the last few years by Chandra and XMM. I will review the prospects for exploring the physics of the shocked and unshocked winds of pulsar wind nebulae at γ-ray energies.

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