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Multi-frequency pulsar studies at high radio frequencies

Published online by Cambridge University Press:  12 April 2016

Michael Kramer  and
Kiriaki M. Xilouris
Michael Kramer
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, Germany
Kiriaki M. Xilouris
Affiliation:
NAIC, Arecibo Observatory, Puerto Rico

Abstract

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We report flux density measurements, polarimetric and timing observations of pulsars made at the highest radio frequencies to date, covering the widest frequency range from 1.4 GHz to 86 GHz. We find that the magnetic field maintains its dipolar structure throughout the active part of the magnetosphere, a region located close to the stellar surface and confined to a small slab of a few stellar radii. The change in width and shape of pulse profiles saturates at mm-wavelengths while the depolarization accelerates, leading to almost completely depolarized emission. Two pulsars seem to exhibit a turn-up in their flux density spectrum at mm-wavelengths.

Type
Part 4 Radio Properties
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 279 - 282
Copyright
Copyright © Astronomical Society of the Pacific 1996

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