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Modified gravity revealed along geodesic tracks
Mariafelicia De Laurentis, Ivan De Martino, Ruth Lazkoz
The study of the dynamics of a two-body system in modified gravity constitutes a more complex problem than in Newtonian gravity. Numerical methods are typically needed to solve the…
How to tell an accreting boson star from a black hole
Hector Olivares, Ziri Younsi, Christian M. Fromm +6
The capability of the Event Horizon Telescope (EHT) to image the nearest supermassive black hole candidates at horizon-scale resolutions offers a novel means to study gravity in it…
The Current Ability to Test Theories of Gravity with Black Hole Shadows
Yosuke Mizuno, Ziri Younsi, Christian M. Fromm +6
Our Galactic Center, Sagittarius A* (Sgr A*), is believed to harbour a supermassive black hole (BH), as suggested by observations tracking individual orbiting stars. Upcoming sub-m…
Observational constraints on Gauss-Bonnet cosmology
Micol Benetti, Simony Santos da Costa, Salvatore Capozziello +2
We analyze a fully geometric approach to dark energy in the framework of theories of gravity, where is the Ricci curvature scalar and is the Gauss-Bo…
Analysis of the Yukawa gravitational potential in gravity II: relativistic periastron advance
Mariafelicia De Laurentis, Ivan De Martino, Ruth Lazkoz
Alternative theories of gravity may serve to overcame several shortcomings of the standard cosmological model but, in their weak field limit, General Relativity must be recovered s…
Analysis of the Yukawa gravitational potential in gravity I: semiclassical periastron advance
Ivan De Martino, Ruth Lazkoz, Mariafelicia De Laurentis
The {\it concordance} cosmological model has been successfully tested throughout the last decades. Despite its successes, the fundamental nature of dark matter and dark energy is s…