Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.201.1119r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 201, Dec. 1982, p. 1119-1138.
Astronomy and Astrophysics
Astronomy
59
Microwave Frequencies, Pulsars, Radiant Flux Density, Scintillation, Stellar Spectra, Time Dependence, Dynamic Response, Fourier Transformation, Interstellar Gas
Scientific paper
Examples are given of the dynamic spectra of the interstellar scintillations for nine pulsars. The autocovariance of the intensity is calculated as a function of separation in time and frequency to yield scattering parameters for eight of the nine pulsars, as well as PSR 1933 + 16. PSR 0833 - 45, one of the original nine, is used in a comparison of the details of autocovariance function shapes, and scaling with frequency, with theory. Further development of the theory is needed for such comparisons to yield data on scale size distribution and interstellar ionized gas irregularities. Systematic patterns were found in the dynamic spectra of PSRs 0628 - 28 and 0834 + 06, implying that the radiation reached predominantly the earth from only a few directions. The implications of these results for irregularity scale distributions in the interstellar medium are discussed.
Ables J. G.
Roberts James A.
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