Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-03-12
Astronomy and Astrophysics
Astrophysics
26 pages, incl. 15 figs; accepted to AJ; java applet available at http://ankh-morpork.maths.qmw.ac.uk/~saha/astron/lens/
Scientific paper
10.1086/375204
We show that some characteristics of multiply-imaged QSO systems are very model-independent and can be deduced accurately by simply scrutinizing the relative positions of images and galaxy-lens center. These include the time-ordering of the images, the orientation of the lens potential, and the rough morphology of any ring. Other features can differ considerably between specific models; H_0 is an example. Surprisingly, properties inherited from a circularly symmetric lens system are model-dependent, whereas features that arise from the breaking of circular symmetry are model-independent. We first develop these results from some abstract geometrical ideas, then illustrate them for some well-known systems (the quads Q2237+030, H1413+117, HST14113+5211, PG1115+080, MG0414+0534, B1608+656, B1422+231, and RXJ0911+0551, and the ten-image system B1933+507), and finally remark on two systems (B1359+154 and PMN J0134-0931) where the lens properties are more complex. We also introduce a Java applet which produces simple lens systems, and helps further illustrate the concepts.
Saha Prasenjit
Williams Liliya L. R.
No associations
LandOfFree
Qualitative Theory for Lensed QSOs 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 Qualitative Theory for Lensed QSOs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Qualitative Theory for Lensed QSOs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-205050