The recent almost coincidental detection of gravitational waves and gamma rays burst by the LIGO-VIRGO network and satellite collaborations, and interpreted as the coalescence of a binary neutron star system, has caused a slaughter of the many extensions of Einstein’s General Theory of Relativity. Such extensions are aimed to resolve several problems, such as the dark matter/dark energy issue, or the existence of singularities deep inside black holes and in the early Universe. In this talk I will introduce a family of Ricci-based metric-affine theories which are compatible with the observations made by LIGO-VIRGO so far. I will thus introduce a taxonomy of the different compact objects found in these theories and how they may contribute to the resolution of spacetime singularities, their astrophysical interpretations, and the understanding of gravitational waves.
2nd CANTATA Meeting