Interstellar scintillation and pulsar velocities

Details Interstellar scintillation and pulsar velocities Interstellar scintillation and pulsar velocities

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.298..825l&link_type=abstract

Nature, vol. 298, Aug. 26, 1982, p. 825-827.

Physics

55

Electron Flux Density, Interstellar Space, Pulsars, Signal Fading, Stellar Motions, Velocity Distribution, Electron Diffraction, Radio Interferometers, Scintillation, Statistical Distributions

Scientific paper

New observations are presented which show that the scintillation characteristics of pulsars are closely related to their velocities, as measured by their proper motions, with no appreciable contribution from velocities within the interstellar medium. A Kolmogorov power law distribution of irregularities rather than a Gaussian distribution was chosen, and the characteristic fading time and correlation bandwidth at 408 MHz was measured for 20 pulsars whose proper motions are known. Bandwidth and time scales were found by fitting gaussian autocorrelation functions. The relation between the observed proper motion velocity and the scintillation velocity is found to be a straight line, with an equal distribution of pulsars above and below the line.

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