The K parameter and evolution of the radio pulsars

Details The K parameter and evolution of the radio pulsars The K parameter and evolution of the radio pulsars

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...380..550x&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 380, Oct. 20, 1991, p. 550-556. Research supported by NNSFC.

Astronomy and Astrophysics

Astrophysics

9

Pulsars, Radio Stars, Stellar Evolution, Astronomical Models, Spatial Distribution

Scientific paper

Pulsar evolution is discussed for the first time by term of a new parameter K in a K-lgt(c) diagram on the basis the model of Candy and Blair. New observation data by Lyne and Manchester (1988) has made a new analysis worthwhile. The quantity K is a defined parameter connecting pulsar geometry to observation. In the diagram a maximum of K seems to exist, and all the pulsars are located under a theoretical curve. The scattering of these dots in these diagram is shown to be a consequence of different limiting values of a pulsar's magnetic inclination angle and emission cone radius rho. The pulsars are discovered to have two evolution stages, characterized by time scales of 6 x 10 exp 4 and 1.5 x 10 exp 7 yr. The magnetic axis is shown to be at random orientation with respect to spin axis at birth, instead of only perpendicular to it. The evolution limit of rho is shown to have a Gaussian distribution around its central value of 5.6 deg and sigma = 2.0 deg. As a result of K analysis, a new method is suggested to determine the geometry of pulsars.

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