Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979nciml..24...72n&link_type=abstract
Nuovo Cimento, Lettere, Serie 2, vol. 24, Jan. 20, 1979, p. 72-74.
Astronomy and Astrophysics
Astronomy
Astronomical Models, Cosmology, Galactic Evolution, Gravitation Theory, Relativistic Theory, Einstein Equations, Quantum Theory, Vacuum
Scientific paper
Nonnull vacuum quantum fluctuations of the gravitational field are analyzed by using a modified version of a small-perturbation technique in which Einstein's equations are regarded as exact microscopic equations for the metric tensor and the geometry undergoes small fluctuations about some mean value of that tensor. A quasi-Maxwellian approach is employed in the framework of a pressure-free Friedmann model, and effects of density-contrast perturbations are examined. A typical solution is obtained for the case where the parameter M in the general linear expression for the Weyl tensor is positive; the time dependence of the contrast factor in this case is found to increase exponentially. It is concluded that for the model considered the perturbation mechanism is efficient enough to play a fundamental role in galaxy formation.
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