Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-01-31
Astronomy and Astrophysics
Astrophysics
13 pages, 3 figures, submitted to ApJ, also available at http://www.sns.ias.edu/~barkana/ellip.html
Scientific paper
10.1086/305950
Because of their simplicity, axisymmetric mass distributions are often used to model gravitational lenses. Since galaxies are usually observed to have elliptical light distributions, mass distributions with elliptical density contours offer more general and realistic lens models. They are difficult to use, however, since previous studies have shown that the deflection angle (and magnification) in this case can only be obtained by rather expensive numerical integrations. We present a family of lens models for which the deflection can be calculated to high relative accuracy (one part in 100000) with a greatly reduced numerical effort, for small and large ellipticity alike. This makes it easier to use these distributions for modelling individual lenses as well as for applications requiring larger computing times, such as statistical lensing studies. A program implementing this method can be obtained from the author (or at http://www.sns.ias.edu/~barkana/ellip.html).
No associations
LandOfFree
Fast calculation of a family of elliptical mass gravitational lens models 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 Fast calculation of a family of elliptical mass gravitational lens models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fast calculation of a family of elliptical mass gravitational lens models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-554439