New Views Through the Gravitational Telescope
Abstract
New improvements in extragalactic research have recently increased the number of sources at high redshift, i.e., QSOs and especially galaxies. Gravitational lensing/magnification events are more common among them, particularly because gravitationally magnified sources are preferentially selected in the flux-limited catalogues used to find distant sources. They offer a means of investigating the matter distribution from small scales (microlensing) to large scales (macrolensing). Recent observations and realistic mass distribution models of the arc-like structures (in A370 and CI 2244-02) allow us to describe the observations well and to set new and independent conditions on the material content of the deflecting clusters; they also allow detailed studies of sources which are at the ends of the gravitational telescopes.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- August 1990
- DOI:
- 10.1007/BF00652699
- Bibcode:
- 1990Ap&SS.170..389H
- Keywords:
-
- Galactic Structure;
- Gravitational Fields;
- Gravitational Lenses;
- Quasars;
- Red Shift;
- Telescopes;
- Astronomical Models;
- Galactic Bulge;
- Galactic Clusters;
- Mass Distribution;
- Pixels;
- Radio Galaxies;
- Spiral Galaxies;
- Stellar Luminosity;
- Astrophysics