Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-04-16
Mon.Not.Roy.Astron.Soc.387:1303-1312,2008
Astronomy and Astrophysics
Astrophysics
10 pages, 6 figures, references updated
Scientific paper
10.1111/j.1365-2966.2008.13325.x
Strong gravitational lensing by galaxies in MOdified Newtonian Dynamics (MOND) has until now been restricted to spherically symmetric models. These models were able to account for the size of the Einstein ring of observed lenses, but were unable to account for double-imaged systems with collinear images, as well as four-image lenses. Non-spherical models are generally cumbersome to compute numerically in MOND, but we present here a class of analytic non-spherical models that can be applied to fit double-imaged and quadruple-imaged systems. We use them to obtain a reasonable MOND fit to ten double-imaged systems, as well as to the quadruple-imaged system Q2237+030 which is an isolated bulge-disc lens producing an Einstein cross. However, we also find five double-imaged systems and three quadruple-imaged systems for which no reasonable MOND fit can be obtained with our models. We argue that this is mostly due to the intrinsic limitation of the analytic models, even though the presence of small amounts of additional dark mass on galaxy scales in MOND is also plausible.
Famaey Benoit
Feix Martin
Shan Huan-Yuan
Zhao HongSheng
No associations
LandOfFree
An analytic model for non-spherical lenses in covariant MOdified Newtonian Dynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An analytic model for non-spherical lenses in covariant MOdified Newtonian Dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An analytic model for non-spherical lenses in covariant MOdified Newtonian Dynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-607771