ar X iv : a st ro - p h / 98 11 25 1 v 1 1 6 N ov 1 99 8 The Microwave Background Bispectrum Paper II : A Probe of the Low Redshift Universe

ar X iv : a st ro - p h / 98 12 32 8 v 1 1 7 D ec 1 99 8 MOND in the Early Universe

I explore some consequences of Milgrom’s modified dynamics for cosmology. There appear to be two promising tests for distinguishing MOND from CDM: (1) the rate of growth of structure and (2) the baryon fraction. These should be testable with observations of clusters at high redshift and the microwave background, respectively.

ar X iv : a st ro - p h / 96 11 14 3 v 1 1 9 N ov 1 99 6 A high deuterium abundance in the early Universe

ar X iv : a st ro - p h / 98 07 09 3 v 1 9 J ul 1 99 8 HOW SMOOTH IS THE UNIVERSE ON LARGE SCALES ?

We review cosmological inference from optical and radio galaxy surveys, the X-Ray Background and the Cosmic Microwave Background. We focus on three topics: (i) First results from the 2dF galaxy redshift survey; (ii) Estimation of cosmological parameters by joint analysis of redshift surveys and CMB data; and (iii) The validity of the Cosmological Principle, and constraints on the fractal dimens...

ar X iv : a st ro - p h / 98 11 24 4 v 1 1 6 N ov 1 99 8 Fast X - ray Variability of PKS 2155 – 304 : A Cross

ar X iv : a st ro - p h / 98 11 01 5 v 1 2 N ov 1 99 8 The large – scale distribution of galaxies in the Shapley Concentration

We present the results of a galaxy redshift survey in the central region of the Shapley Concentration. Our total sample contains ∼ 2000 radial velocities of galaxies both in the clusters and in the inter-cluster field. We reconstruct the density profile of this supercluster, calculate its overdensity and total mass. Moreover we detect a massive structure behind the Shapley Concentration, at ∼ 3...