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A Search for Variable Interstellar Magnetic Fields and Neutron Star Precession in Four Years of Polarization Position Angle Measurements on 98 Pulsars

Published online by Cambridge University Press:  12 April 2016

J. M. Weisberg ,
J. J. Morgan ,
J. T. Despotes ,
J. E. Everett  and
J. M. Cordes
J. M. Weisberg
Affiliation:
Department of Physics & Astronomy, Carleton College, Northfield, MN 55057USA
J. J. Morgan
Affiliation:
Department of Physics & Astronomy, Carleton College, Northfield, MN 55057USA
J. T. Despotes
Affiliation:
Department of Physics & Astronomy, Carleton College, Northfield, MN 55057USA
J. E. Everett
Affiliation:
Department of Physics & Astronomy, Carleton College, Northfield, MN 55057USA
J. M. Cordes
Affiliation:
Department of Astronomy & NAIC, Cornell University, Ithaca, NY 14853USA

Abstract

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We have studied the temporal behavior of linearly polarized position angle in a sample of 98 pulsars observed from Arecibo over a four–year period in a search for free precession and changes in interstellar magnetic fields along pulsar– earth lines of sight. We set upper limits on changes in position angle.

Type
Part 3. Studies of Radio Emission
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 269 - 270
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Everett, J.E., & Weisberg, J.M. 1997, “The Free Precession of an Oblate Star,” Mathematica Notebook on the MathSource Library, at URL www.mathsource.com/cgi-bin/MathSource/Applications/Astronomy/0208-572 Google Scholar
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Weisberg, J.M., Cordes, J.M., Lundgren, S.C., Dawson, B.R., Despotes, J.T., Morgan, J.J., Weitz, K.A., Zink, E.C., & Backer, D.C. 1999, ApJS, 121, 171 Google Scholar