Short-lived Radio Bursts from the Crab Pulsar
High Energy Astrophysical Phenomena
2015-05-19 v1
Abstract
Our high-time-resolution observations reveal that individual main pulses from the Crab pulsar contain one or more short-lived microbursts. Both the energy and duration of bursts measured above 1 GHz can vary dramatically in less than a millisecond. These fluctuations are too rapid to be caused by propagation through turbulence in the Crab Nebula or the interstellar medium; they must be intrinsic to the radio emission process in the pulsar. The mean duration of a burst varies with frequency as , significantly different from the broadening caused by interstellar scattering. We compare the properties of the bursts to some simple models of microstructure in the radio emission region.
Cite
@article{arxiv.1009.0735,
title = {Short-lived Radio Bursts from the Crab Pulsar},
author = {Jared H. Crossley and Jean A. Eilek and Timothy H. Hankins and Jeff S. Kern},
journal= {arXiv preprint arXiv:1009.0735},
year = {2015}
}
Comments
34 pages, 10 figures; accepted for publication in ApJ