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12 papers · 2 filters
Galaxy Dynamics Predictions in the Nonsymmetric Gravitational Theory
J. W. Moffat
In the weak field approximation, the nonsymmetric gravitational theory has, in addition to the Newtonian gravitational potential, a Yukawa potential produced by the exchange of a s…
Complete Model of a Self-gravitating Cosmic String I. A New Class of Exact Solutions and Gravitational Lensing
Charles C. Dyer, Francine R. Marleau
We find solutions of Einstein's field equation for topologically stable strings associated with the breaking of a U(1) symmetry. Strings form in many GUTs and are expected whenever…
Surveys for Z>1 Field Galaxies; David Crampton
C. L. Morbey, O. Le Fevre, F. Hammer +3
In the course of the comprehensive CFRS redshift survey to I = 22.5 with the CFHT MOS/SIS spectrograph, we have observed ~25 field galaxies with z > 1. However, it is clear that al…
Non-Linear Cluster Lens Reconstruction
Nick Kaiser
We develop a method for general non-linear cluster lens reconstruction using the observable distortion of background galaxies. The distortion measures the combination of…
Gravitational instability in the strongly nonlinear regime: A study of various approximations
B. S. Sathyaprakash, V. Sahni, D. Munshi +2
We study the development of gravitational instability in the strongly non-linear regime. For this purpose we use a number of statistical indicators such as filamentary statistics,…
The Damping and Excitation of Galactic Warps by Dynamical Friction
Robert W. Nelson, Scott Tremaine
We investigate the dynamical interaction of galactic warps with the surrounding dark matter halo, using analytic perturbation theory. A precessing warp induces a density wake in th…