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Eikonal quasinormal modes of black holes beyond general relativity II: generalised scalar-tensor perturbations
Hector O. Silva, Kostas Glampedakis
Black hole `spectroscopy', i.e. the identification of quasinormal mode frequencies via gravitational wave observations, is a powerful technique for testing the general relativistic…
Cosmological attractors to general relativity and spontaneous scalarization with disformal coupling
Hector O. Silva, Masato Minamitsuji
The canonical scalar-tensor theory model which exhibits spontaneous scalarization in the strong-gravity regime of neutron stars has long been known to predict a cosmological evolut…
Eikonal quasinormal modes of black holes beyond General Relativity
Kostas Glampedakis, Hector O. Silva
Much of our physical intuition about black hole quasinormal modes in general relativity comes from the eikonal/geometric optics approximation. According to the well-established eik…
More than the sum of its parts: combining parameterized tests of extreme gravity
Hector O. Silva, Nicolás Yunes
We connect two formalisms that describe deformations away from general relativity, one valid in the strong-field regime of neutrons stars and another valid in the radiative regime…
Finite size effects on the light curves of slowly-rotating neutron stars
Hajime Sotani, Hector O. Silva, George Pappas
An important question when studying the light curves produced by hot spots on the surface of rotating neutron stars is, how might the shape of the light curve be affected by relaxi…
Fundamental physics implications on higher-curvature theories from the binary black hole signals in the LIGO-Virgo Catalog GWTC-1
Remya Nair, Scott Perkins, Hector O. Silva +1
Gravitational-wave astronomy offers not only new vistas into the realm of astrophysics, but it also opens an avenue for probing, for the first time, general relativity in its stron…