A New Wide-Separation Gravitational Lens Candidate: RXJ 0921+4529

1999/09/20 by J. A. Munoz, J. A. Muñoz, Munoz, J. A. +25
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9909338

To appear in "Gravitational Lensing: Recent Progress and Future Goals", ASP conference series, eds Brainerd & Kochanek

arxiv created 1999/09/20 · openalex publication_date 1999/09/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The lens candidate RXJ 0921+4529 consists of two z_s=1.66 quasar separated by 6."93 with an H band magnitude difference of Δm=1.39. The lens appears to be a z_l=0.31 X-ray cluster, including a m_H=18.5 late-type galaxy lying between the quasar images. We detect an extended source overlapping the faint quasar but not the bright quasar. If this extended source is the host galaxy of the fainter quasar, then the system is a quasar binary rather than a gravitational lens.

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