Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-07-18
2007, MNRAS, 381, L55
Astronomy and Astrophysics
Astrophysics
Accepted to MNRAS Letters. 5 pages, 6 figures, 3 tables
Scientific paper
10.1111/j.1745-3933.2007.00365.x
We report a probable gravitational lens J0316+4328, one of 19 candidate asymmetric double lenses (2 images at a high flux density ratio) from CLASS. Observations with the Very Large Array (VLA), MERLIN and the Very Long Baseline Array (VLBA) imply that J0316+4328 is a lens with high confidence. It has 2 images separated by 0.40", with 6 GHz flux densities of 62 mJy and 3.2 mJy. The flux density ratio of ~19 (constant over the frequency range 6-22 GHz) is the largest for any 2 image gravitational lens. High resolution optical imaging and deeper VLBI maps should confirm the lensing interpretation and provide inputs to detailed lens models. The unique configuration will give strong constraints on the lens galaxy's mass profile.
Boyce Edward R.
Browne I. W. A.
Jackson Neal J.
Myers Steven T.
Stroman W. J.
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