Separation of the polarization modes in several pulsars

Details Separation of the polarization modes in several pulsars Separation of the polarization modes in several pulsars

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...255..181g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 255, no. 1-2, p. 181-190.

Astronomy and Astrophysics

Astrophysics

24

Circular Polarization, Emission Spectra, Linear Polarization, Pulsars, Modes, Polarization Characteristics, Space Observations (From Earth)

Scientific paper

We have studied the position angle distribution in the observed emission from several pulsars following the separation technique previously described. We have found two different polarization modes in every pulsar studied. The modes are by no means orthogonal throughout the whole pulse profile. The deviations from orthogonality are typically about 30 deg but can be as large as 60 deg. When a pulse profile is single or complex with outermost components not clearly resolved, the position angle separation between the modes is nonorthogonal in the center and orthogonal at the profile wings. However, when a pulse profile is double or complex with outermost components well resolved, the separation is orthogonal in the center and nonorthogonal in the outer components. In the primary (or dominant) polarization mode, the position angle usually follows a smooth rotation with a maximum gradient in the center of symmetry. In this sense the primary mode is consistent with a rotating vector model and therefore reflects the geometry of magnetic field in the emission region. The secondary mode is in some cases inconsistent with the rotating vector model in the above sense.

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