Alternative Gravity in the Gravitational Wave Era

Dear Colleagues,

In view of the cosmological constant problem, which is the very high discrepancy between the theoretical and experimental values of the quantum vacuum energy density, we have been facing a plethora of proposals to modify Einstein’s field equations of General Relativity. These modifications could, in principle, explain the cosmic acceleration the universe is undergoing, usually related to some sort of dark energy. Further, several observations in the galactic and extra-galactic scales point to the existence of dark matter, although no dark matter particle has been detected so far. It is likely to consider that dark energy and dark matter could be geometrical effects in a broader theory of gravity.

Since 2016, Gravitational Wave Astronomy has become an important tool to distinguish and constrain Alternative Theories of Gravity, allied to the usual observations in the electromagnetic spectrum.

This Special Issue aims to summarize the research that has been carried out in the field of Alternative Theories of Gravity and their confrontation with astronomical data and applications mainly to explain the “dark sector” of the universe, namely dark energy and dark matter effects.  

Prof. Dr. Pedro Henrique Ribeiro da Silva Moraes
Prof. Dr. Tiberiu Harko
Guest Editors

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• dark energy
• dark matter
• alternative theories of gravity
• cosmic acceleration
• rotation curves of galaxies
• gravitational waves
• compact objects
• relativistic astrophysics
• experimental tests of gravitational theories
• structure formation