Physics
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aujph..32....9c&link_type=abstract
(Joint Australia-USSR-USA Symposium on Pulsars and Supernova Remnants, Sydney, Australia, Apr. 1978.) Australian Journal of Phys
Physics
19
Periodic Variations, Polarization (Waves), Pulsar Magnetospheres, Pulsars, Stellar Structure, Amplitude Modulation, Microstructure, Pulsed Radiation, Shot Noise, Stellar Atmospheres, Stellar Radiation
Scientific paper
This paper discusses characteristic time scales, periodicities and polarization of microstructure in pulsar signals. The relationship of microstructure polarization to the polarization of subpulses and the average profile is analyzed in detail for PSR 2016+28. For this pulsar the contributions of micropulses to the variance of the intensity vary with radio frequency nu approximately as 1/nu and the characteristic time scale varies as nu to the -alpha, with alpha between approximately 0.2 and 0.3. In summarizing possible interpretations of microstructure, a distinction is made between angular beaming and temporal modulation processes that can cause intensity variations. An outline is given, with regard to the frequency dependence of pulse structure, of how micropulses can be used to probe the depth and variability of the emission region.
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