A complete infrared Einstein ring in the gravitational lens system B1938 + 666

Creators: King, L. J.; Jackson, N.; Blandford, R. D.; Bremer, M. N.; Browne, I. W. A.; de Bruyn, A. G.; Fassnacht, C.; Koopmans, L.; Marlow, D.; Wilkinson, P. N.

Abstract

We report the discovery, using NICMOS on the Hubble Space Telescope, of an arcsec-diameter Einstein ring in the gravitational lens system B1938 + 666. The lensing galaxy is also detected, and is most likely an early-type galaxy. Modelling of the ring is presented and compared with the radio structure from MERLIN maps. We show that the Einstein ring is consistent with the gravitational lensing of an extended infrared component, centred between the two radio components.

Additional Information

© 1998 RAS. Accepted 1998 January 30. Received 1998 January 30; in original form 1997 October 15. This research used observations with the Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by Associated Universities for Research in Astronomy Inc. under NASA contract NAS5-26555. MERLIN is operated as a National Facility by NRAL, University of Manchester, on behalf of the UK Particle Physics & Astronomy Research Council. This research was supported in part by European Commission, TMR Programme, Research Network Contract ERBFMRXCT96-0034 'CERES'. We thank Mark Lacy and Hanadi Abdel-Salam for useful discussions. LJK is grateful to the Astrophysics Department, University of Oxford, for hospitality during part of the writing of this paper.

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