Developing radio beam geometry and luminosity models of pulsars

Details Developing radio beam geometry and luminosity models of pulsars Developing radio beam geometry and luminosity models of pulsars

2006-11-07

arxiv.org/abs/astro-ph/0611236v1

Astronomy and Astrophysics

Astrophysics

10 pages, 6 figures, The 2005 Lake Hanas International Pulsar Symposium. Accepted in Chinese Journal of Astronomy & Astrophysi

Scientific paper

Our recent studies of pulsar population statistics suggest that improvements of radio and gamma-ray beam geometry and luminosity models require further refinement. The goal of this project is to constrain the viewing geometry for some radio pulsars, especially three-peaked pulse profiles, in order to limit the uncertainty of the magnetic inclination and impact angles. We perform fits of the pulse profile and position angle sweep of radio pulsars for the available frequencies. We assume a single core and conal beams described by Gaussians. We incorporate three different size cones with frequency dependence from the work of Mitra & Deshpande (1999). We obtain separate spectral indices for the core and cone beams and explore the trends of the ratio of core to cone peak fluxes. This ratio is observed to have some dependence with period. However, we cannot establish the suggested functional form of this ratio as indicated by the work of Arzoumanian, Chernoff & Cordes (2002).

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