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Linear Polarization Properties of Pulsars at 35 & 327 MHz

Published online by Cambridge University Press:  12 April 2016

Ashish Asgekar
Affiliation:
Raman Research Institute, Sadashivnagar, Bangalore 560 080, INDIA Joint Astronomy Programme, Indian Institute of Science, Bangalore 560 012, INDIA
A. A. Deshpande
Affiliation:
Raman Research Institute, Sadashivnagar, Bangalore 560 080, INDIA

Extract

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Faraday Rotation of the plane of polarization of broad-band signals, during propagation through the intervening medium, manifests as quasi-sinusoidal spectral modulations when observed with a telescope sensitive to a single linear polarization. Such a modulation can be exploited to study linear polarization characteristics of pulsars (Suleimanova, Volodin, & Shitov, 1988; Smirnova & Boriakoff 1997, Ramkumar & Deshpande 1999 (RD99)). We have used our data on a few bright pulsars at 35 MHz (Asgekar & Deshpande 1999, elsewhere in this volume) and data obtained at 327 MHz using Ooty Radio Telescope (see RD99 for details), to study average linear polarization properties using this technique. The data obtained over 256 frequency channels were re-sampled in the spectral domain to make the Faraday modulation appear periodic, and then a simple Fourier analysis was performed to look for (ACF) features associated with the possible spectral modulation (see RD99 for the analysis details).

Type
Part 3. Studies of Radio Emission
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Asgekar, A., & Deshpande, A.A. 1999, see this volumeGoogle Scholar
Deshpande, A.A., & Ramkumar, P.S. 1999, J.Astrophys. Astr., 20, 37 (RD99)Google Scholar
Smirnova, T.V., & Boriakoff, V. 1997, A&A, 321, 305 Google Scholar
Suleimanova, S.A., Volodin, Yu.V., & Shitov, Yu.P. 1988, Soviet Ast., 32, 177 Google Scholar