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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…
Reconnection-driven particle acceleration in relativistic shear flows
Lorenzo Sironi, Michael E. Rowan, Ramesh Narayan
Particle energization in shear flows is invoked to explain non-thermal emission from the boundaries of relativistic astrophysical jets. Yet, the physics of particle injection, i.e.…
Decomposing the Internal Faraday Rotation of Black Hole Accretion Flows
Angelo Ricarte, Ben S. Prather, George N. Wong +3
Faraday rotation has been seen at millimeter wavelengths in several low luminosity active galactic nuclei, including Event Horizon Telescope (EHT) targets M87* and Sgr A*. The obse…
A Prospective ISRO-CfA Himalayan Sub-millimeter-wave Observatory Initiative
T. K. Sridharan, Shmuel Bialy, Raymond Blundell +20
The Smithsonian Astrophysical Observatory (SAO), a member of the Center for Astrophysics | Harvard and Smithsonian, is in discussions with the Space Applications Centre (SAC) of th…
SYMBA: An end-to-end VLBI synthetic data generation pipeline
F. Roelofs, M. Janssen, I. Natarajan +203
Realistic synthetic observations of theoretical source models are essential for our understanding of real observational data. In using synthetic data, one can verify the extent to…