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Pulsar Profiles and Structure of the Emission Region

Published online by Cambridge University Press:  12 April 2016

Arkady Kuzmin
Arkady Kuzmin*
Affiliation:
Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute, Pushchino, Moscow Reg., 142292, Russia

Abstract

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Recent radio observations of pulsar profiles and the present knowledge about structure of the emission region based on this profiles data are reviewed.

Observations and component structure analysis revealed that there are pulsars profiles having more than 5 components. It call into question that the commonly adopted model of emission region as the double hollow cones and a central core is applicable. Mosaic model of an emission region fit observed profiles with complex more than 5 component structure.

The height (radius) for the emission region evaluated from a dependence of a width of integrated profiles from the pulsar period is estimated as rem ≅ 1.5 × l07P0.1 cm.

A comparative analysis of the frequency dependence of the profile widths of millisecond and normal pulsars in 0.1 to 1.4 GHz frequency range indicates that the frequency dependence of a width of their profiles, is much weaker than what is typically observed for normal pulsars. This suggests that the geometry of the emission region of millisecond pulsars is unlike that of normal ones.

Type
Part 3. Studies of Radio Emission
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 189 - 194
Copyright
Copyright © Astronomical Society of the Pacific 2000

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