Speaker
Description
Starting with the current understanding of radio pulsar emission, we investigate the polarization resolved pulse profiles of radio pulsar PSR J1900–2600 observed by the MeerKAT Telescope at 1280 and 816 MHz. We apply three novel models: Birefringent filtering, Modified Partial Coherence and Mode Coupling to explain depolarization, mode conversion (emergence of circular polarization) and deviation of polarization position angle (PA) tracks from the Rotating Vector Model. The first model attributes observed polarization features to birefringent filtering by an intervening magnetized plasma screen. Second considers the partial coherence combination of the two orthogonal propagation modes (OPMs) and lastly, the third model incorporates the effect of interdependence of the two OPMs and effect of the polarisation-limiting radius. We evaluate the ability of each model and their possible combinations to explain the observed polarisation characteristics. Our goal is to introduce novel pulsar data analysis methods and identify the dominant physical mechanisms shaping the polarised emission in radio pulsars.