Polarimetric Properties of the Crab Pulsar between 1.4 and 8.4 GHz

Details Polarimetric Properties of the Crab Pulsar between 1.4 and 8.4 GHz Polarimetric Properties of the Crab Pulsar between 1.4 and 8.4 GHz

1999-04-30

arxiv.org/abs/astro-ph/9904421v1

Astronomy and Astrophysics

Astrophysics

20 pages, 7 postscript figures, uses aaspp4 Latex style. To appear in Volume 522 of The Astrophysical Journal

Scientific paper

10.1086/307654

New polarimetric observations of the Crab pulsar at frequencies between 1.4 and 8.4 GHz are presented. Additional pulse components discovered in earlier observations (Moffett & Hankins 1996, astro-ph/9604163) are found to have high levels of linear polarization, even at 8.4 GHz. No abrupt sweeps in position angle are found within pulse components; however, the position angle and rotational phase of the interpulse do change dramatically between 1.4 and 4.9 GHz. The multi-frequency profile morphology and polarization properties indicate a non-standard origin of the emission. Several emission geometries are discussed, but the one favored locates sites of emission both near the pulsar surface and in the outer magnetosphere.

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