Gravitational lenses: odd or even images?

Details Gravitational lenses: odd or even images? Gravitational lenses: odd or even images?

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cqgra..16.1689g&link_type=abstract

Classical and Quantum Gravity, Volume 16, Issue 6, pp. 1689-1694 (1999).

Mathematics

2

Scientific paper

In this paper we first recall the Morse relations for light rays in vacuum. They can be obtained, under quite general assumptions, by the relativistic Fermat principle stated by Kovner and correctly proved by Perlick. They can be used for a global mathematical description of the gravitational lens effect. Afterwards we consider the well known thin lens model and we observe that the light rays having a geometrical index equal to 2 have a strong constraint about the surface density where they pass the deflector. Finally, we note that in situations similar, for example, to the Einstein cross (whose models predict the existence of one light ray having its geometrical index equal to 2), the constraint on the surface density suggests that the absorption may be so high that the related image is quite difficult to detect.

Affiliated with

Also associated with

No associations

Rating

Gravitational lenses: odd or even images? 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 Gravitational lenses: odd or even images?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational lenses: odd or even images? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1498780