SIMBAD references

2007A&A...464..921S - Astronomy and Astrophysics, volume 464, 921-925 (2007/3-4)

An f(R) gravitation for galactic environments.

SOBOUTI Y.

Abstract (from CDS):

We propose an action-based f(R) modification of Einstein's gravity that admits a modified Schwarzschild-deSitter metric. In the weak field limit this amounts to adding a small logarithmic correction to the Newtonian potential. A test star moving in such a spacetime acquires a constant asymptotic speed at large distances. This speed, calibrated empirically, is proportional to the fourth root of the mass of the central body in compliance with the Tully-Fisher relation. A variance of MOND's gravity emerges as an inevitable consequence of the proposed formalism. It has also been shown (Mendoza et al., 2006, astroph/0610390) that a) the gravitational waves in this spacetime propagate with the speed of light in vacuum and b) there is a lensing effect added to what one finds in the classic GR.

Abstract Copyright:

Journal keyword(s): cosmology: theory - cosmology: dark matter - gravitation - galaxies: photometry

Errata: erratum vol.472, p. 833 (2007)

Simbad objects: 31

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