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Testing the Existence of Event Horizons against Rotating Reflecting Surfaces
Joost de Kleuver, Thomas Bronzwaer, Heino Falcke +4
Recently the Event Horizon Telescope observed black holes at event horizon scales for the first time, enabling us to now test the existence of event horizons. Although event horizo…
Constraints on black-hole charges with the 2017 EHT observations of M87*
Prashant Kocherlakota, Luciano Rezzolla, Heino Falcke +234
Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M8…
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 Black Hole Accretion Code: adaptive mesh refinement and constrained transport
Hector Olivares, Oliver Porth, Yosuke Mizuno
With the forthcoming VLBI images of Sgr A* and M87, simulations of accretion flows onto black holes acquire a special importance to aid with the interpretation of the observations…
Test-particle dynamics in general spherically symmetric black hole spacetimes
Mariafelicia De Laurentis, Ziri Younsi, Oliver Porth +2
To date, the most precise tests of general relativity have been achieved through pulsar timing, albeit in the weak-field regime. Since pulsars are some of the most precise and stab…
Constraining alternative theories of gravity using GW and GW
Mariafelicia De Laurentis, Oliver Porth, Luke Bovard +2
The recently reported gravitational wave events GW and GW caused by the mergers of binary black holes [arXiv:1602.03841],[arXiv:1606.04855],[arXiv:1606.04856] provi…
The Black Hole Accretion Code
Oliver Porth, Hector Olivares, Yosuke Mizuno +5
We present the black hole accretion code (BHAC), a new multidimensional general-relativistic magnetohydrodynamics module for the MPI-AMRVAC framework. BHAC has been designed to sol…