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Simultaneous single-pulse observations of radio pulsars

A. KarastergiouMax-Planck Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, GermanyM. KrämerJodrell Bank Observatory, University of Manchester, Macclesfield, Chesire SK11 9DL, UKS. JohnstonSchool of Physics, University of Sydney, NSW 2006, AustraliaA. G. LyneJodrell Bank Observatory, University of Manchester, Macclesfield, Chesire SK11 9DL, UKN. D. R. BhatArecibo Observatory, HC3 Box 53995, Arecibo, Puerto Rico, PR 00612, USAYashwant GuptaNCRA, TIFR, Pune University Campus, Ganeshkhind, Pune 411007, India

2002en

ABI

Annotatsiya

In this letter, we present a study of orthogonal polarization modes in the radio emission of PSR B1133+16, conducted within the frame of simultaneous, multi-frequency, single-pulse observations. Simultaneously observing at two frequencies (1.41 GHz and 4.85 GHz) provides the means to study the bandwidth of polarization features such as the polarization position angle. We find two main results. First, that there is a high degree of correlation between the polarization modes at the two frequencies. Secondly, the modes occur more equally and the fractional linear polarization decreases towards higher frequencies. We discuss this frequency evolution and propose propagation effects in the pulsar magnetosphere as its origin.

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Identifikatorlar

DOI: 10.1051/0004-6361:20020793

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