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In the Quest for Cosmic Rotation
Korotky, Vladimir A.; Masár, Eduard; Obukhov, Yuri N.
This paper analyzes the problem of global rotation in general relativity (GR) theory. Simple cosmological models with rotation and expansion are presented, which give a natural explanation of the modern values of the acceleration parameter at different red shifts without involving the concepts of "dark energy" and "dark matter". It is shown that d…
Modified Newtonian Gravity, Wide Binaries and the Tully-Fisher Relation
Acedo, Luis
A recent study of a sample of wide binary star systems from the Hipparcos and Gaia catalogues has found clear evidence of a gravitational anomaly of the same kind as that appearing in galaxies and galactic clusters. Instead of a relative orbital velocity decaying as the square root of the separation, ΔV∝r‑1/2, it was shown that an asymptotic const…
A Test of Gravitational Theories Including Torsion with the BepiColombo Radio Science Experiment
Schettino, Giulia; Serra, Daniele; Tommei, Giacomo +1 more
Within the framework of the relativity experiment of the ESA/JAXA BepiColombo mission to Mercury, which was launched at the end of 2018, we describe how a test of alternative theories of gravity, including torsion can be set up. Following March et al. (2011), the effects of a non-vanishing spacetime torsion have been parameterized by three torsion…