374 citations · 2.5k across the 52 of their papers we have counts for
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The Black Hole Explorer: Using the Photon Ring to Visualize Spacetime Around the Black Hole
Peter Galison, Michael D. Johnson, Alexandru Lupsasca +2
The Black Hole Explorer (BHEX), an orbiting, multi-band, millimeter radio-telescope, in hybrid combination with millimeter terrestrial radio-telescopes, is designed to discover 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…
The Black Hole Explorer: Photon Ring Science, Detection and Shape Measurement
Alexandru Lupsasca, Alejandro Cárdenas-Avendaño, Daniel C. M. Palumbo +6
General relativity predicts that black hole images ought to display a bright, thin (and as-of-yet-unresolved) ring. This "photon ring" is produced by photons that explore the stron…
Explanation for the absence of secondary peaks in black hole light curve autocorrelations
Alejandro Cárdenas-Avendaño, Charles Gammie, Alexandru Lupsasca
The observed radiation from hot gas accreting onto a black hole depends on both the details of the flow and the spacetime geometry. The lensing behavior of a black hole produces a…
Photon Ring Interferometric Signatures Beyond The Universal Regime
He Jia, Eliot Quataert, Alexandru Lupsasca +1
We calculate the interferometric signatures of black hole photon rings beyond the universal regime by perturbatively including the effects of finite ring width. Our approach first…
Assessing the impact of instrument noise and astrophysical fluctuations on measurements of the first black hole photon ring
Alejandro Cárdenas-Avendaño, Lennox Keeble, Alexandru Lupsasca
Currently envisioned extensions of the Event Horizon Telescope to space will soon target the black hole photon ring: a narrow ring-shaped imprint of a black hole's strong gravity p…