Intrinsic variations of the double quasar 0957 + 56 AB

Details Intrinsic variations of the double quasar 0957 + 56 AB Intrinsic variations of the double quasar 0957 + 56 AB

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..727l&link_type=abstract

Nature, vol. 294, Dec. 24-31, 1981, p. 727, 728.

Astronomy and Astrophysics

Astronomy

10

Elliptical Galaxies, Galactic Clusters, Gravitational Lenses, Quasars, Radio Sources (Astronomy), Light Curve, Luminous Intensity, Photometry, Spectrum Analysis

Scientific paper

Observations are reported which show a variation of about 1 mag in the two quasars 0957 + 56 A and B, and behavior typical of intrinsically variable quasars with similar radio structure. The near-constancy of the magnitude difference between the components at several epochs, despite overall variations, favors all variations being intrinsic to the quasar; at the same time, support is given for the hypothesis that the images are produced by the gravitational lensing of a single distant quasar by a giant elliptical galaxy and its attendant cluster. Recent variations of component B1 limit the time delay between the images to between 2 and 24 yr.

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