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Optical Imaging Of B1422+231 – Prospects For Determining the Hubble Constant

Published online by Cambridge University Press:  25 May 2016

J. Hjorth ,
A.O. Jaunsen ,
A.R. Patnaik  and
J.-P. Kneib
J. Hjorth
Affiliation:
Institute of Astronomy, Madingley Rd., Cambridge CB3 0HA, UK
A.O. Jaunsen
Affiliation:
Nordic Optical Telescope, Ap. 474, S/C de La Palma, E-38700 Canarias, Spain
A.R. Patnaik
Affiliation:
Max Planck-Institut für Radioastronomie, Auf dem Hügel 69, D–53121 Bonn, Germany
J.-P. Kneib
Affiliation:
Institute of Astronomy, Madingley Rd., Cambridge CB3 0HA, UK

Abstract

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We report on observations indicating that the bright quadruple lens B1422+231 may be variable in the optical on a time scale of hours. We also find that a model can reproduce the optical positions and magnifications. Unfortunately, the system may be affected by possible microlensing and external shear. HST should provide a good model for the lens, the system should be monitored for several nights in superb seeing (0.3-0.4 arcsec FWHM), and the redshifts of the south-east galaxies should be determined. With this extra information, improved modeling will tell whether it is realistic to obtain H0 from the time delays of B1422+231.

Type
Chapter 9: Observational Developments
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 343 - 344
Copyright
Copyright © Kluwer 1996 

References

Hammer, F., Rigaut, F., & Angonin-Willaime, M.-C. 1995, A&A, 298, 737 Google Scholar
Schechter, P. L. 1993, in Proc. 31st Liège Int. Astrophys. Colloq., Gravitational Lenses in the Universe, eds. Surdej, J. et al. (Liège: Université de Liège), 119 Google Scholar