arXiv subjects

Moshe Carmeli

Publications and source records attributed to Moshe Carmeli.

23 records · Page 2Linked to original sources

arXiv1999

SL(2,C) Gauge Theory of Gravitation and the Quantization of the Gravitational Field

A new approach to quantize the gravitational field is presented. It is based on the observation that the quantum character of matter becomes more significant as one gets closer to the big bang. As the metric loses its meaning, it makes sense to consider Schrodinger's three generic types of manifolds - unconnected differentiable, affinely connected, and metrically connected - as a temporal sequence following the big bang. Hence one should quantize the gravitational field on general differentiable manifolds or on affinely connected manifolds. The SL(2,C) gauge theory of gravitation is employed to explore this possibility. Within this framework, the quantization itself may well be canonical.

gr-qc↗

arXiv1999

Aspects of Cosmological Relativity

We review cosmological relativity, a new special theory of relativity that was recently developed for cosmology, and discuss in detail some of its aspects.

gr-qc↗

arXiv1999

An Amended Formula for the Decay of Radioactive Material for Cosmic Times

An amended formula for the decay of radioactive material is presented. It is a modification of the standard exponential formula. The new formula applies for long cosmic times that are comparable to the Hubble time. It reduces to the standard formula for short times. It is shown that the material decays faster than expected. The application of the new formula to direct measurements of the age of the Universe and its implications is briefly discussed.

astro-ph↗

arXiv1999

Derivation of the Tully-Fisher Law from General Relativity Theory: Doubts about the Existence of Halo Dark Matter

Observations show that for disk galaxies the fourth power of the circular velocity of stars around the core of the galaxy is proportional to the luminosity L. This is known as the Tully-Fisher law. Since L is proportional to the mass M of the galaxy, it follows that the fourth power of the circular velocity is proportional to M. Newtonian mechanics, however, tells that the square of the circular velocity is proportional to M. In order to rectify this big difference, astronomers assume the existence of halo dark matter. In this paper we show that general relativity theory yields a term of the Tully-Fisher form. This puts doubts about the necessity and existence of halo dark matter for galaxies.

astro-ph↗

arXiv1996

Is Galaxy Dark Matter a Property of Spacetime?

We describe the motion of a particle in a central field in an expanding universe. Use is made of a double expansion in 1/c and 1/T, where c and T are the speed of light and the Hubble time. In the lowest approximation the fourth power of the rotational velocity is shown to be proportional to (2/3)GMcHo, where G is Newton's gravitational constant, M is the mass of the central body (galaxy) and Ho is the Hubble constant. This formula satisfies observations of stars moving in spiral and elliptical galaxies, and in accordance with the familiar Tully-Fisher law.

astro-ph↗