ar X iv : a st ro - p h / 96 06 10 8 v 1 1 8 Ju n 19 96 Horizontal Branch Morphology and the 2 nd Parameter Problem

ar X iv : a st ro - p h / 96 06 17 9 v 1 2 9 Ju n 19 96 LECTURE 1 Coalescence of Binary Neutron Stars

ar X iv : a st ro - p h / 96 11 06 6 v 1 8 N ov 1 99 6 Horizontal Branch Morphology in Galactic Globular Clusters : Dense Environment is “ a ” Second Parameter

The Horizontal Branch (HB) morphology in the color – magnitude diagram of the Galactic globular clusters depends on many factors, and it is now firmly established that the so-called " Second Parameter " is not just the cluster age as claimed for several years. As a part of a wider program devoted to the search for the physical processes driving the Horizontal Branch Morphology, we re-address he...

ar X iv : a st ro - p h / 96 05 07 0 v 2 1 7 Ju n 19 96 A time – dependent Cosmological ” Constant ”

We extend the Wald cosmic no–hair theorem to a general class of scalar–tensor nonminimally coupled theories of gravity where ordinary matter is also present in the form of a perfect fluid. We give a set of conditions for obtaining a de Sitter expansion independently of any initial conditions, generalizing the treatment of such a problem as given by Wald. Finally we apply the results to some spe...

ar X iv : a st ro - p h / 96 01 12 9 v 1 2 3 Ja n 19 96 Is Her X - 1 a strange star

The possible identification of Her X-1 with a strange star (Li et al. 1995) is shown to be incorrect.

ar X iv : a st ro - p h / 97 06 19 2 v 1 1 8 Ju n 19 97 Metal Abundance in the Solar

It is shown that the metal abundance in the solar interior is constrained from the current solar neutrino experiment, even if one allows neutrino conversion in the sun due to neutrino oscillation. The result shows that the metal abundance in the interior should be within the range 0.4–1.4 times that in the surface, supporting the idea that the sun formed by a contraction of a gas cloud with an ...