Interstellar Scintillations of Pulsar Radiation

Details Interstellar Scintillations of Pulsar Radiation Interstellar Scintillations of Pulsar Radiation

Dec 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969sci...166.1401l&link_type=abstract

Science, Volume 166, Issue 3911, pp. 1401-1403

Physics

12

Scientific paper

Time fluctuations in the intensity of pulsed radiation from CP 0834, CP 1133, AP 1237, and CP 1919 have been investigated. Power spectra, modulation indices, frequency distributions, and decorrelation frequencies are consistent with scintillation theory. If it is assumed that these scintillations are due to irregularities in the interstellar medium that travel at a velocity of 20 kilometers per second, the irregularities have a scale size on the order of 104 kilometers and a distance from the earth of approximately 70 parsecs. These interstellar scintillations would not have been observed if the apparent angular diameters of the pulsars were larger than 0.3 × 10-5 second of arc, and they would cause even a point radio source to have an apparent angular diameter of approximately 10-3 second of arc at 318 megahertz.

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