317 citations · 1.2k across the 32 of their papers we have counts for
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: A Differentiable -based Code for Radiative Transfer in Curved Spacetimes
Pedro Naethe Motta, Ben S. Prather, Alejandro Cárdenas-Avendaño
Recent imaging of supermassive black holes by the Event Horizon Telescope (EHT) has relied on exhaustive parameter-space searches, matching observations to large, precomputed libra…
Inferring Black Hole Spin from Interferometric Measurements of the First Photon Ring: A Geometric Approach
Lennox S. Keeble, Alejandro Cárdenas-Avendaño, Daniel C. M. Palumbo
Accurately inferring black hole spin is crucial for understanding black hole dynamics and their astrophysical environments. In this work, we outline a geometric method for spin est…
Multi-Frequency Models of Black Hole Photon Rings from Low-Luminosity Accretion Disks
Tejahni Desire, Alejandro Cárdenas-Avendaño, Andrew Chael
Images of black holes encode both astrophysical and gravitational properties. Detecting highly-lensed features in images can differentiate between these two effects. We present an…
Morphology of Relativistically Broadened Line Emission from Axisymmetric Equatorial Accretion Disks
Delilah E. A. Gates, Chau Truong, Amrita Sahu +1
Single-frequency emission from an accretion disk around a black hole is broadened into a line profile due to gravitational redshift and the motion of the disk's particles relative…
Measuring Black Hole Light Echoes with Very Long Baseline Interferometry
George N. Wong, Lia Medeiros, Alejandro Cárdenas-Avendaño +1
Light passing near a black hole can follow multiple paths from an emission source to an observer due to strong gravitational lensing. Photons following different paths take differe…
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…
Modeling uncertainties in X-ray reflection spectroscopy measurements II: Impact of the radiation from the plunging region
Alejandro Cardenas-Avendano, Menglei Zhou, Cosimo Bambi
X-ray reflection spectroscopy is a powerful tool to probe the strong gravity region around black holes, but the available relativistic reflection models have a number of simplifica…