401 citations · 636 across the 16 of their papers we have counts for
18 papers
The Structure in the Structure Function of Black Hole Light Curves
Daniel C. M. Palumbo, Alejandro Cárdenas-Avendaño, Lena Murchikova
Of the two black holes, M87 and Sgr~A, for which event-horizon-scale imaging is currently achievable, only Sgr~A at our Galactic Center exhibits sub-hour varia…
Bayesian Evidence for Inspiraling Hotspot Motion in the Galactic Center
Pablo Ruales, Maciek Wielgus, Delilah E. A. Gates +1
During flaring episodes, polarimetric observations of the Galactic Center black hole Sagittarius A* (Sgr A*) reveal evolving, loop-like trajectories in the Stokes Q-U plane, the so…
A Four-Dimensional Gaussian Random Field Generator for Modeling Spatiotemporal Variability in Astrophysical Sources
Alejandro Cárdenas-Avendaño, Diego Rubiera-Garcia, Frederic H. Vincent
Semi-analytic models of black-hole movies require both an emitting flow prescription and a time-dependent source variability. Existing prescriptions are often limited to either equ…
Light Propagation Prescriptions for Black Hole Movies
Daniel Rojas-Paternina, Alejandro Cárdenas-Avendaño
The spatiotemporal content of a black-hole movie is set jointly by source variability and by the distribution of light-travel times across the image. In the slow-light prescription…
Parameter-estimation bias induced by transient orbital resonances in extreme-mass-ratio inspirals
Edoardo Levati, Alejandro Cárdenas-Avendaño
Given the multifrequency nature of relativistic orbits, transient orbital resonances are expected to be ubiquitous during an extreme-mass-ratio inspiral (EMRI). At a resonance, the…
Sensitivities of Black Hole Images from GRMHD Simulations
Pedro Naethe Motta, Mário Raia Neto, Cora Prather +1
The advent of high-fidelity imaging of supermassive black holes calls for efficient and robust data-analysis methods. In this work, we use , a differentiable, $\te…
Polarization Signatures of Inspiraling Hotspots around Kerr Black Holes
Pablo Ruales, Delilah E. A. Gates, Alejandro Cárdenas-Avendaño
Polarimetric interferometry is a powerful tool for probing both black hole accretion physics and the background spacetime. Current models aimed at explaining the observed multiwave…
Multidisciplinary Science in the Multimessenger Era
Eric Burns, Christopher L. Fryer, Ivan Agullo +82
Astrophysical observations of the cosmos allow us to probe extreme physics and answer foundational questions on our universe. Modern astronomy is increasingly operating under a hol…
Perturbative and non-linear analyses of gravitational turbulence in spacetimes with stable light rings
Jaime Redondo-Yuste, Alejandro Cárdenas-Avendaño
Some black hole mimickers, as well as black strings and other higher-dimensional spacetimes, exhibit stable light rings-regions where light or high-frequency gravitational waves ca…
Testing gravity with Extreme-Mass-Ratio Inspirals
Alejandro Cárdenas-Avendaño, Carlos F. Sopuerta
Extreme-mass-ratio inspirals consist of binary systems of compact objects, with orders of magnitude differences in their masses, in the regime where the dynamics are driven by grav…
A Lensing-Band Approach to Spacetime Constraints
Alejandro Cárdenas-Avendaño, Aaron Held
General relativity's prediction that all black holes are described by the Kerr metric, irrespective of their size, can now be empirically tested using electromagnetic observations…
Waveform Modelling for the Laser Interferometer Space Antenna
LISA Consortium Waveform Working Group, Niayesh Afshordi, Sarp Akçay +144
LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave astronomy. As the first anticipated space-based gravitational-wave detector, it will exp…
Challenges in Quasinormal Mode Extraction: Perspectives from Numerical solutions to the Teukolsky Equation
Hengrui Zhu, Justin L. Ripley, Alejandro Cárdenas-Avendaño +1
The intricacies of black hole ringdown analysis are amplified by the absence of a complete set of orthogonal basis functions for quasinormal modes. Although damped sinusoids effect…
Prediction for the interferometric shape of the first black hole photon ring
Alejandro Cárdenas-Avendaño, Alexandru Lupsasca
Black hole images are theoretically predicted (under mild astrophysical assumptions) to display a stack of lensed "photon rings" that carry information about the underlying spaceti…
Adaptive Analytical Ray Tracing of Black Hole Photon Rings
Alejandro Cárdenas-Avendaño, Alexandru Lupsasca, Hengrui Zhu
Recent interferometric observations by the Event Horizon Telescope have resolved the horizon-scale emission from sources in the vicinity of nearby supermassive black holes. Future…
Blandford-Znajek Process in Quadratic Gravity
Jameson Dong, Nicolás Patiño, Yiqi Xie +3
The Blandford-Znajek process, which uses a magnetized plasma to extract energy from a rotating black hole, is one of the leading candidates for powering relativistic jets. In this…
Prospects for Fundamental Physics with LISA
Enrico Barausse, Emanuele Berti, Thomas Hertog +318
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental…
Astrobites as a Community-led Model for Education, Science Communication, and Accessibility in Astrophysics
Gourav Khullar, Susanna Kohler, Tarini Konchady +21
Support for early career astronomers who are just beginning to explore astronomy research is imperative to increase retention of diverse practitioners in the field. Since 2010, Ast…