Higher-order theories of gravity matched with large-scale structure and cosmological observations |
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Authors: | Salvatore Capozziello |
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Institution: | (1) Department Physics & Astronomy, University of Southern California, College of Letters, Arts & Sciences, Los Angeles, CA 90089-0484, USA;(2) Department Physics, University of California, Davis, Davis, CA 95616, USA |
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Abstract: | The so-called f(R)-gravity could, in principle, explain the accelerated expansion of the Universe without adding unknown forms of dark energy/dark
matter, but more simply extending the general relativity by generic functions of the Ricci scalar. However, as a part of several
phenomenological models, there is no final f(R)-theory capable of fitting all the observations and addressing all the issues related to the presence of dark energy and
dark matter. Astrophysical observations are pointing out huge amounts of “dark matter” and “dark energy” needed to explain
the observed large-scale structures and cosmic accelerating expansion. Up to now, no experimental evidence has been found,
at a fundamental level, to explain such mysterious components. The problem could be completely reversed considering dark matter
and dark energy as “shortcomings” of general relativity. |
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