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Cosmic Ray Positrons from PulsarsPulsars are potential Galactic sources of positrons through pair cascades in their magnetospheres. There are, however, many uncertainties in establishing their contribution to the local primary positron flux. Among these are the local density of pulsars, the cascade pair multiplicities that determine the injection rate of positrons from the pulsar, the acceleration of the injected particles by the pulsar wind termination shock, their rate of escape from the pulsar wind nebula, and their propagation through the interstellar medium. I will discuss these issues in the context of what we are learning from the new Fermi pulsar detections and discoveries.
Document ID
20100014830
Document Type
Conference Paper
Authors
Harding, Alice K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
February 28, 2010
Subject Category
Astronomy
Meeting Information
High Energy Astrophysics Division (HEAD 2010)(Waikoloa, HI)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.