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Crab Pulsar: Enhanced Optical Emission During Giant Radio Pulses

Published online by Cambridge University Press:  20 April 2012

Susan Collins ,
Andy Shearer ,
Ben Stappers ,
Cesare Barbieri ,
Giampiero Naletto ,
Luca Zampieri ,
Enrico Verroi  and
Serena Gradari
Susan Collins
Affiliation:
NUI Galway, Ireland, email: susan.collins@nuigalway.ie
Andy Shearer
Affiliation:
NUI Galway, Ireland, email: susan.collins@nuigalway.ie
Ben Stappers
Affiliation:
Jodrell Bank Center for Astrophysics, UK
Cesare Barbieri
Affiliation:
University of Padova, Italy
Giampiero Naletto
Affiliation:
University of Padova, Italy
Luca Zampieri
Affiliation:
INAF Astronomical Observatory of Padova, Italy
Enrico Verroi
Affiliation:
University of Padova, Italy
Serena Gradari
Affiliation:
University of Padova, Italy
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Abstract

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Although optical pulsar studies have been limited to a few favoured objects, the observation of pulsars at optical wavelengths provides an opportunity to derive a number of important pulsar characteristics, including the energy spectrum of the emitting electrons and the geometry of the emission zone. These parameters will be vital for a comprehensive model of pulsar emission mechanisms. Observations of the Crab pulsar with the high-time-resolution photon-tagging photometer IquEYE show an optical–radio delay of ~178 μs. Incorporating simultaneous Jodrell Bank radio observations suggested a correlation between giant radio pulses and enhanced optical pulses for this pulsar, thus offering possible evidence for the reprocessing of radio photons.

Keywords

pulsars: individual (Crab)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S285: New Horizons in Time-Domain Astronomy , September 2011 , pp. 296 - 298
Copyright
Copyright © International Astronomical Union 2012

References

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