Other
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277..367b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 1, 1984, p. 367-374.
Other
5
Linear Polarization, Polarization Characteristics, Pulsars, Radiative Transfer, Astronomical Models, Neutron Stars, Plasma-Electromagnetic Interaction, Polarized Electromagnetic Radiation
Scientific paper
It is suggested that the salient features of linear polarization in pulsars (e.g., the existence and nonorthogonality of the bimodal distribution of P.A.) are due primarily to the geometry of the source and not to radiative transfer effects or properties of the emission mechanism. The emission region is described by a rotating but otherwise stationary three-dimensional distribution of polarization directions. Observed polarization is due to a combination of the symmetry properties of this distribution and random fluctuations in the density of the radiating bunches of particles. The properties of the model are analyzed, and a comparison with observations shows that the large variety of polarization behavior on all time scales (micropulse, subpulse, and integrated pulse profile) can be given a straightforward explanation. Problems besetting radiative transfer models are discussed, and it is shown that many of them are resolved in geometrical models. Moreover, it is argued that there is neither a need nor any direct observational evidence for radiative transfer effects to occur away from the point of emission.
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