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Observational Signatures of Frame Dragging in Strong Gravity
Angelo Ricarte, Daniel C. M. Palumbo, Ramesh Narayan +2
Objects orbiting in the presence of a rotating massive body experience a gravitomagnetic frame-dragging effect, known as the Lense-Thirring effect, that has been experimentally con…
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…
Light echos and coherent autocorrelations in a black hole spacetime
Paul M. Chesler, Lindy Blackburn, Sheperd S. Doeleman +4
The Event Horizon Telescope recently produced the first images of a black hole. These images were synthesized by measuring the coherent correlation function of the complex electric…
Accretion disks around naked singularities
Jun-Qi Guo, Pankaj S. Joshi, Ramesh Narayan +1
We investigate here the thermal properties of accretion disks in a spacetime for some galactic density profiles in spherical symmetry. The matter distributions have a finite outer…
Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
Dimitrios Psaltis, Lia Medeiros, Pierre Christian +185
The 2017 Event Horizon Telescope (EHT) observations of the central source in M87 have led to the first measurement of the size of a black-hole shadow. This observation offers a new…
Singularities in Reissner-Nordström black holes
Paul M. Chesler, Ramesh Narayan, Erik Curiel
We study black holes produced by the collapse of a spherically symmetric charged scalar field in asymptotically flat space. We employ a late time expansion and show decaying fluxes…