T R Seshadri
Articles written in Pramana – Journal of Physics
Volume 53 Issue 6 December 1999 pp 963-969 Cosmic Microwave Background Radiation
In re-ionized models, the measurement of polarization of CMBR can be a good criterion to narrow down the parameter space for cosmological models. A Vishniac-type effect in second order polarization over arc minute scales has been calculated. It has been shown that while the effect is very small (∼10−2
Volume 53 Issue 6 December 1999 pp 989-993 Large Scale Structure and Gravitational Clustering
We have carried out a multi-fractal analysis of the distribution of galaxies in the three Northern slices of the Las Campanas redshift survey. In this analysis we have studied the scaling properties of the distribution of galaxies on length scales from 20 h−1 Mpc to 200 h−1 Mpc. Our main results are: (1) The distribution of galaxies exhibits a multi-fractal scaling behaviour over the scales 20 h−1 Mpc to 80 h−1 Mpc, and, (2) the distribution is consistent with homogeneity on the scales 80 h−1 Mpc to 200 h−1 Mpc. We conclude that our results are consistent with the Universe being homogeneous at large scales and the transition to homogeneity occurs somewhere in the range 80 h−1 Mpc to 100 h−1 Mpc.
Volume 55 Issue 4 October 2000 pp 599-601
The topics on which there were presentations in this workshop can broadly be divided into the following categories: Observational aspects of large-scale structures in the universities; phase transitions in the early universe; cosmic microwave background radiation; observational cosmology.
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