2 papers
astro-ph1996
Evolution in the Lyman-alpha forest
Thomas Liebscher, Rainer Kayser, Phillip Helbig
We reanalyse the spectra used by D.-E. Liebscher (no relation) et al with the same goal -- determining the cosmological parameters -- and basically the same assumptions but with a…
astro-ph1994
The complex theory of gravitational lensing: Beltrami equation and cluster lensing
T. Schramm, R. Kayser
We introduce a new complex formalism to describe arclet fields in clusters of galaxies and derive the appropriate inversion techniques to find the related mass distribution of the…