ar X iv : a st ro - p h / 04 07 23 2 v 1 1 2 Ju l 2 00 4 B The Saas Fee Lectures on Strong Gravitational Lensing

ar X iv : a st ro - p h / 01 08 25 5 v 1 1 5 A ug 2 00 1 WEAK AND STRONG LENSING STATISTICS 1

After a brief introduction to gravitational lensing theory, a rough overview of the types of gravitational lensing statistics that have been performed so far will be given. I shall then concentrate on recent results of galaxy-galaxy lensing, which indicate that galactic halos extend much further than can be probed via rotation of stars and gas.

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ar X iv : a st ro - p h / 02 10 60 4 v 1 2 8 O ct 2 00 2 Weak Lensing Results from the 75 Square Degree CTIO Survey

We measure seeing-corrected ellipticities for 2 × 10 6 galaxies with magnitude R ≤ 23 in 12 widely separated fields totalling 75 deg 2 of sky. At angular scales 30 ′ , ellipticity correlations are detected at high significance and exhibit nearly the pure " E-mode " behavior expected of weak gravitational lensing. Even when smoothed to the full field size of 2.

X iv : a st ro - p h / 04 07 22 2 v 2 1 3 Ju l 2 00 4 Einstein - Rosen Bridges and the Characteristic Properties

It is shown that Einstein-Rosen bridges (wormholes) hypothetical objects that topologically connect separate locations in the Universe can be static solutions of the Einstein equations. The corresponding equations for bridges are reduced to a form convenient for their analysis and numerical solution. The matter forming the bridge must have a sufficiently hard and anisotropic equation of state. ...

ar X iv : a st ro - p h / 05 04 03 6 v 1 1 A pr 2 00 5 Gemini and Chandra observations of Abell 586 , a relaxed strong - lensing cluster

We analyze the mass content of the massive strong-lensing cluster Abell 586 (z = 0.17). We use optical data (imaging and spectroscopy) obtained with the Gemini Multi-Object Spectrograph (GMOS) mounted on the 8-m Gemini-North telescope, together with publicly available X-ray data taken with the Chandra space telescope. Employing different techniques – velocity distribution of galaxies, weak grav...