A Test for the Gravitational Lens Hypothesis in the Most Luminous Quasar: S5 0014+81

  • H. Kühr
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


The most luminous quasar known, S5 0014+81 (z = 3.41), was extensively studied with direct CCD imaging, and with radio interferometric techniques using the VLA as well as MK II and MK III VLBI systems. Optical spectroscopic observations revealed a high column density metal absorption system at z = 1.11, and VLA maps displayed a weak second radio component. We thus had evidence for the possible existence of a gravitational lens, which may have boosted the observed flux of the quasar towards an energy output of about 5*1048 erg/s. However, results from subsequent VLA and VLBI observations are not compatible with such interpretation, instead the weak radio component is probably associated with a jet-like phenomenon and does not provide evidence for or against a gravitational lens.


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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • H. Kühr
    • 1
  1. 1.Max-Planck-Institut für AstronomieKönigstuhl, Heidelberg 1Germany

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