Repulsive gravitational forces - A possible mechanism for clustering

Details Repulsive gravitational forces - A possible mechanism for clustering Repulsive gravitational forces - A possible mechanism for clustering

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...211...16e&link_type=abstract

Astrophysical Journal, vol. 211, Jan. 1, 1977, pt. 1, p. 16-20.

Physics

Cosmology, Gravitation Theory, Gravitational Effects, Relativity, Astronomical Models, Field Theory (Physics), Universe

Scientific paper

It is well known that in a homogeneous cosmological universe, a positive cosmological constant induces repulsive forces. The paper shows that in a locally inhomogeneous cosmological model, these repulsive forces are related to the sign of q, the deceleration parameter of the associated cosmological space, and to the sign of the apparent mass of the central perturbation (which can be negative with a positive energy density everywhere). When q is almost zero - crossing the value zero - small random perturbations of the matter density are the sources of a gravitational instability which can generate a mechanism of fragmentation in an a priori homogeneous universe.

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