Articles written in Journal of Astrophysics and Astronomy
Volume 1 Issue 2 December 1980 pp 119-128
We offer two possible explanations to account for the characteristics of integrated pulse profiles, in particular their degree of complexity, their variation from pulsar to pulsar, their stability, and the tendency of complex profiles to be associated with older pulsars.
It is proposed that the pulse structure could be a reflection of surface irregularities at the polar caps, and it is shown how the surface relief can affect the number of positrons released into the magnetosphere which are subsequently responsible for the observed radio radiation. The electrons produced in the vacuum break-down in the gap carry enough energy to allow creating such a surface relief in ∼ 106 years, and one way in which this could be achieved is discussed.
Alternatively, the presence of multipole components in the magnetic fields of older pulsars could lead to significant variations in the curvature of the field lines across the gap, and hence to structure in the integrated pulse profiles. An assessment of the two hypotheses from observed pulse profiles seems to favour the polar cap relief picture.
Volume 2 Issue 3 September 1981 pp 315-337
We make a statistical analysis of the periods
Volume 3 Issue 3 September 1982 pp 237-247
Selection effects are a major source of error in statistical studies of pulsar data since the observed sample is a biased subset of the full galactic pulsar population. It is important to identify all selection effects and make a reasonable model before attempting to determine pulsar properties. Here we discuss a hitherto neglected selection effect which is a function of the period
Volume 3 Issue 4 December 1982 pp 399-412
We impose the requirement that the spatial distribution of pulsars deduced from their dispersion measures using a model of the galactic electron density (
Volume 41, 2020
Continuous Article Publishing mode
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