A survey for metrewave variability in extragalactic radio sources

Details A survey for metrewave variability in extragalactic radio sources A survey for metrewave variability in extragalactic radio sources

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235.1313s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 15, 1988, p. 1313-1341.

Astronomy and Astrophysics

Astronomy

17

Astronomical Models, Extragalactic Radio Sources, Sky Surveys (Astronomy), Spectral Energy Distribution, Correlation, Radio Transmission, Regression Analysis, Variability

Scientific paper

The authors report a detailed statistical study of the intensity variations in 412 extragalactic radio sources randomly selected from the ≡2000 sources which have been observed with the Culgoora circular array at 80 and 160 MHz during the interval 1970-84. The results are partly consistent with an origin in refractive scintillation by large-scale electron density turbulence in the intervening medium. There are, however, serious difficulties in explaining, from the existing theory of slow galactic scintillation, the short time-scale of the scintillation. The results are probably more in accord with the focusing and occulting effects of compact interstellar ionized structures recently identified at microwave frequencies.

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