Absolute polarisation position angle profiles of southern pulsars at 1.4 and 3.1 GHz

Abstract

We present here a direct comparison of the polarisation position angle (PA) profiles of 17 pulsars, observed at 1.4 and 3.1 GHz. Absolute PAs are obtained at each frequency, permitting a measurement of the difference in the profiles. By doing this, we obtain more precise rotation measure (RM) values for some of the pulsars in the current catalogue. We find that, apart from RM corrections, there are small, pulse longitude dependent differences in PA with frequency. Such differences go beyond the interpretation of a geometrical origin. We describe in detail the PA evolution between the two frequencies and discuss possible causes, such as orthogonal and non-orthogonal polarisation modes of emission. We also use the PA and total power profiles to estimate the difference in emission height at which the two frequencies originate. In our data sample, there are changes in the relative strengths of different pulse components, especially overlapping linearly polarised components, which coincide with intrinsic changes of the PA profile, resulting in interesting PA differences between the two frequencies.

Accepted for publication in MNRAS

References in corpus (5)

• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• Comparing Geometrical and Delay Radio Emission Heights in Pulsars
• Polarisation profiles of southern pulsars at 3.1 GHz
• Effects of Quasi-Orthogonal EMission Modes on the Rotation Measures of Pulsars
• An investigation of the absolute circular polarization in radio pulsars

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