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Anomalous Pulsar Scattering at LOFAR Frequencies

Published online by Cambridge University Press:  04 June 2018

Marisa Geyer  and
Aris Karastergiou
Marisa Geyer
Affiliation:
Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK email: marisa.geyer@physics.ox.ac.uk
Aris Karastergiou
Affiliation:
Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK email: marisa.geyer@physics.ox.ac.uk Physics Department, University of the Western Cape, Cape Town 7535, South Africa Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
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Abstract

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The Low Frequency Array (LOFAR) is ideally suited to pulsar scattering studies, providing broad bands at low frequencies where the imprints of the ionized Interstellar Medium (IISM) are exaggerated. We analyse a set of sources at 110–190 MHz, and find unexpectedly shallow dependencies of pulse scatter broadening on frequency. These anomalous scattering values are discussed by considering evidence for anisotropic scattering and small scattering clouds.

Keywords

pulsars: generalscatteringISM: structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S337: Pulsar Astrophysics the Next Fifty Years , September 2017 , pp. 275 - 278
Copyright
Copyright © International Astronomical Union 2018 

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