Dark energy from ``extended modified gravity'' and Gauss-Bonnet invariant term

Details Dark energy from ``extended modified gravity'' and Gauss-Bonnet invariant term Dark energy from ``extended modified gravity'' and Gauss-Bonnet invariant term

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.327..161e&link_type=abstract

Astrophysics and Space Science, Volume 327, Issue 2, pp.161-165

Astronomy and Astrophysics

Astrophysics

Extended Modified Gravity Gauss–Bonnet Gravity, Dark Energy, Accelerated Expansion

Scientific paper

There exists strong observational evidence for dark energy. The work done in this letter is just a new kind of extended modified gravity theory to yield a universe accelerating in time and dominated by dark energy. The extended modified gravity constructed here includes simultaneously a Gauss-Bonnet invariant term and a new Einstein-Hilbert term f( R, φ)= E( φ) R- μ R -1 which depends on both the scalar curvature and on the scalar field φ through a generic function E( φ). It is shown that the presence of both terms provides remarkably many interesting features, which are discussed in some detail.

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