Rapid variability of extragalactic radio sources

Details Rapid variability of extragalactic radio sources Rapid variability of extragalactic radio sources

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.337..442q&link_type=abstract

Nature (ISSN 0028-0836), vol. 337, Feb. 2, 1989, p. 442-444.

Physics

72

Bl Lacertae Objects, Extragalactic Radio Sources, Quasars, Variability, Brightness Distribution, Gravitational Lenses, Light Curve, Radiant Flux Density, Wave Scattering

Scientific paper

Observations of rapid variability in extragalactic radio sources at wavelengths of 6 and 11 cm are reported. The quasar QSO0917+62 showed variations with amplitudes of up to 23 percent in about 24 hours, which were correlated at the two wavelengths. In the BL Lac object 0716+71, variations with amplitudes of 7-11 percent were found. Intrinsic effects, gravitational lensing, and scattering in the interstellar medium are discussed as possible explanations for rapid radio variability.

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