Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210...79n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Sept. 1, 1984, p. 79-88.
Astronomy and Astrophysics
Astronomy
31
Astronomical Models, Elliptical Galaxies, Galactic Clusters, Gravitational Lenses, Quasars, Very Long Base Interferometry, Plasma Jets, Radio Spectra, Stellar Mass, Time Lag, Ubv Spectra
Scientific paper
The twin quasar QSO 0957 + 561 A,B along with bright radio arches and VLBI structures is modeled using a gravitational lens consisting of the giant elliptical galaxy and the background cluster. The effective time-delay between components A and B comes out to be around one year, which is significantly different from the value obtained by Young et al. for a similar set of lens parameters. It is demonstrated that the observed intensity variation in component B between 1979 and mid-1981, reported by Keel (1982) can result from minilensing by low mass stars.
Chitre S. M.
Narasimha D.
Subramanian Kandaswamy
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