Interstellar scattering of pulsar radiation. 1: Scintillation

Details Interstellar scattering of pulsar radiation. 1: Scintillation Interstellar scattering of pulsar radiation. 1: Scintillation

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ispr.book.....b&link_type=abstract

Interstellar scattering of pulsar radiation. I. Scintillation., by Backer, D. C.. Separate print Natl. Aeronaut. Space Adm., Gr

Physics

1

Interstellar Space, Pulsars, Scattering, Scintillation, Diffraction Patterns, Electron Density (Concentration), Intergalactic Media

Scientific paper

An investigation of the intensity fluctuations of 28 pulsars near 0.4 GHz indicates that scintillation spectra have a Gaussian shape, scintillation indices are near unity, and the scintillation bandwidth depends linearly on dispersion measure. Observations near 2.5 GHz suggest a strong dependence of the frequency at which scintillation indices fall below unity on dispersion measure. Multistation measurements of scintillation provide values or limits for the scale size of the scattering diffraction pattern. The dependences of scattering parameters on dispersion measure is discussed in terms of the current models. It is suggested that any line of sight through the galaxy encounters increasingly rare, increasingly large deviations of thermal electron density on the scale of 10 to the 11th power cm.

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