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Evolution of Multipolar Magnetic Fields in Isolated Neutron Stars and its effect on Pulsar Radio Emission

Published online by Cambridge University Press:  12 April 2016

D. Mitra ,
S. Konar ,
D. Bhattacharya ,
A. V. Hoensbroech ,
J. H. Seiradakis  and
R. Wielebinski
D. Mitra
Affiliation:
Raman Research Institute, Bangalore 560 080, India
S. Konar
Affiliation:
Inter University Center for Astronomy and Astrophysics, Pune, India
D. Bhattacharya
Affiliation:
Raman Research Institute, Bangalore 560 080, India
A. V. Hoensbroech
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, Germany
J. H. Seiradakis
Affiliation:
University of Thessaloniki, Department of Physics, Laboratory of Astronomy, GR-54006 Thessaloniki, Greece
R. Wielebinski
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, Germany

Abstract

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The evolution of the multipolar structure of the magnetic field of isolated neutron stars is studied assuming the currents to be confined to the crust. Lower orders (≤ 25) of multipole are seen to evolve in a manner similar to the dipole suggesting little or no evolution of the expected pulse shape. We also study the multifrequency polarization position angle traverse of PSR B0329+54 and find a significant frequency dependence above 2.7 GHz. We interpret this as an evidence of strong multipolar magnetic field present in the radio emission region.

Type
Part 3. Studies of Radio Emission
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 265 - 266
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Mitra, D., 1999, PhD Thesis submitted to Jawaharlal Nehru University, New Delhi Google Scholar
Mitra, D., Konar, S. & Bhattacharya, D., 1999, MNRAS, 307, 459 CrossRefGoogle Scholar
Radhakrishnan, V. & Cooke, D.J., 1969, Astrophysics Letters, 3, 225 Google Scholar