5 papers
Extreme-Lensing Signatures Revealed by Correlations of Simulated Black-Hole Movies
Barbora BezdÄková, Shahar Hadar, George Wong +1
A black hole's gravitational pull can deflect light rays to an arbitrary degree. As a result, any source fluctuation near the black hole creates multiple lagged images on an observ…
Net Charge Accretion in Magnetized Kerr Black Holes
Ethan Berreby, Avner Okun, Shahar Hadar +1
We investigate the charging process of a rotating Kerr black hole of mass and angular momentum immersed in a stationary, axisymmetric, asymptotically uniform magnetic field…
The symplectic geometry of the black hole photon shell
Judy Shir, Shahar Hadar
The unstably bound, critical null geodesics of the Kerr spacetime form a distinguished class of orbits whose properties govern observables such as the photon ring and the high-freq…
Exploring lensing signatures through spectrotemporal correlations: implications for black hole parameter estimation
Sreehari Harikesh, Shahar Hadar, Doron Chelouche
Extreme gravitational lensing and relativistic frequency shifts, combined together, imply that radiation emitted from a black hole's vicinity can echo at different frequencies and…
The Black Hole Explorer: Motivation and Vision
Michael D. Johnson, Kazunori Akiyama, Rebecca Baturin +65
We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry…