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Testing General Relativity with the Event Horizon Telescope
Dimitrios Psaltis
The Event Horizon Telescope is a millimeter VLBI array that aims to take the first pictures of the black holes in the center of the Milky Way and of the M87 galaxy, with horizon sc…
Detection of intrinsic source structure at ~3 Schwarzschild radii with Millimeter-VLBI observations of SAGITTARIUS A*
Ru-Sen Lu, Thomas P. Krichbaum, Alan L. Roy +53
We report results from very long baseline interferometric (VLBI) observations of the supermassive black hole in the Galactic center, Sgr A*, at 1.3 mm (230 GHz). The observations w…
A Model for Anisotropic Interstellar Scattering and its Application to Sgr A*
Dimitrios Psaltis, Michael Johnson, Ramesh Narayan +3
Scattering in the ionized interstellar medium is commonly observed to be anisotropic, with theories of magnetohydrodynamic (MHD) turbulence explaining the anisotropy through a pref…
Principal Component Analysis as a Tool for Characterizing Black Hole Images and Variability
Lia Medeiros, Tod R. Lauer, Dimitrios Psaltis +1
We explore the use of principal component analysis (PCA) to characterize high-fidelity simulations and interferometric observations of the millimeter emission that originates near…
Tidal deformability from GW170817 as a direct probe of the neutron star radius
Carolyn Raithel, Feryal Özel, Dimitrios Psaltis
Gravitational waves from the coalescence of two neutron stars were recently detected for the first time by the LIGO-Virgo collaboration, in event GW170817. This detection placed an…