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Modelling the Gravitational Lens of the Double Quasar

Published online by Cambridge University Press:  14 August 2015

P. K. Moore  and
S. M. Harding
P. K. Moore
Affiliation:
Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire
S. M. Harding
Affiliation:
Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire

Extract

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The discovery of the double quasar (Walsh ET AL. 1979) provides an opportunity to study the mass distribution of elliptical galaxies and clusters of galaxies. This has been done initially by Young ET AL. (1981) who produced a model to account for the image positions and intensities. Since then VLBI observations have been made of 0957+561A and B (Porcas ET AL. 1981) which show very similar core and jet structures in the nuclei of both images. In addition to providing further evidence in favour of the gravitational lens hypothesis, these new observations provide additional constraints on the mass distribution of the lensing galaxy and cluster. We have attempted to produce a model in the light of these new results.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 461 - 462
Copyright
Copyright © Reidel 1982 

References

Greenfield, P.E., Burke, B.F. & Roberts, D.H., Nature 286, 865 (1980)Google Scholar
Porcas, R.W., Booth, R.S., Browne, I.W.A., Walsh, D. & Wilkinson, P.N., Nature 289, 758 (1981)Google Scholar
Young, P., Gunn, J.E. Kristian, J., Oke, J.B. & Westphal, J.A., Ap. J. 244, 736 (1981).Google Scholar
Walsh, D., Carswell, R.F. & Weymann, R.J., Nature 279, 381 (1979)CrossRefGoogle Scholar