Light Propagation in Inhomogeneous Universes II. Cosmological Parameter Survey资料.pdfVIP

LIGHT PROPAGATION IN INHOMOGENEOUS UNIVERSES II. COSMOLOGICAL PARAMETER SURVEY 1,2 3 4,5 2 PREMANA PREMADI , HUGO MARTEL , RICHARD MATZNER , TOSHIFUMI FUTAMASE 1 Department of Astronomy Bosscha Observatory, Bandung Institute of Technology, Indonesia 2 Astronomical Institute, Tohoku University, Sendai, Japan 3 Department of Astronomy, University of Texas, Austin, TX 78712 4 Center for Relativity, University of Texas, Austin, TX 78712 1 5 Department of Physics, University of Texas, Austin, TX 78712 0 0 2 n a ABSTRACT J 1 Using a multiple-lens plane algorithm, we study light propagation in inhomogeneous universes, for 43 2 different COBE-normalized Cold Dark Matter models, with various values of the density parameter Ω0 , cosmological constant λ , Hubble constant H , and rms density fluctuation σ . This is the largest cosmolog- 0 0 8 1 ical parameter survey ever done in this field. We performed a total of 3,798 experiments, each experiment v ′′ ′′ 9 consisting of propagating a square beam of angular size 21.9 × 21.9 composed of 116,281 light rays from 5 the observer up to redshift z = 3. These experiments provide statistics of the magnification, shear, and 3 multiple imaging of distant sources. The results of these experiments can be compared with observations, 1 and eventually help constra