ar X iv : a st ro - p h / 03 06 56 7 v 1 2 6 Ju n 20 03 1 The Optical Gravitational Lensing Experiment

ar X iv : a st ro - p h / 04 06 56 7 v 1 2 4 Ju n 20 04 1

ar X iv : a st ro - p h / 03 06 46 5 v 1 2 3 Ju n 20 03 Gravitational lensing as a probe of structure

Gravitational lensing has become one of the most interesting tools to study the mass distribution in the Universe. Since gravitational light deflection is independent of the nature and state of the matter, it is ideally suited to investigate the distribution of all (and thus also of dark) matter in the Universe. Lensing results have now become available over a wide range of scales, from the sea...

ar X iv : a st ro - p h / 02 06 49 6 v 1 2 7 Ju n 20 02 To appear in ApJL Rethinking Lensing and Λ

Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models where the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5–1) increased significantly wit...

ar X iv : a st ro - p h / 03 06 44 3 v 1 2 3 Ju n 20 03 MAGNETIC FIELDS IN COSMOLOGY

Different mechanisms which may possibly explain existence of magnetic fields on astronomically large scales are described. A recently suggested model of magnetic fields generation slightly before hydrogen recombination is discussed in more detail.

ar X iv : a st ro - p h / 03 06 25 3 v 1 1 2 Ju n 20 03 Is there a Gravitational Thomas Precession ?

Gravitational Thomas Precession ( GTP ) is the name given to Thomas Precession when the acceleration is caused by a gravitational force field. The contribution of the GTP to the the anomalous perihelion advance of the orbit of Mercury is here estimated at ̇̃ ωGTP = 21 · 49 [ 1 + ( ~ L · ~ S ) L ] arcsec/century ,where ~ L and ~ S respectively represents the orbital angular momentum and the spin a...