169 citations · 488 across the 15 of their papers we have counts for
15 papers
Constraining Black Hole Horizon Properties Through Long-Duration Gravitational Wave Observations
Ikram Hamoudy, Julian Westerweck, Ofek Birnholtz
We perform a long-duration Bayesian analysis of gravitational-wave data to constrain the near-horizon geometry of black holes formed in binary mergers. Deviations from the Kerr geo…
Hierarchical constraints on gravitational waves from horizonless compact objects
Rajrupa Mondal, Julian Westerweck, Yotam Sherf +2
We use the data of several promising gravitational wave observations to obtain increasingly stringent bounds on near-horizon deviations of their sources from the Kerr geometry. A r…
Black hole spectroscopy: from theory to experiment
Emanuele Berti, Vitor Cardoso, Gregorio Carullo +65
The "ringdown" radiation emitted by oscillating black holes has great scientific potential. By carefully predicting the frequencies and amplitudes of black hole quasinormal modes a…
Theory-agnostic searches for non-gravitational modes in black hole ringdown
Francesco Crescimbeni, Xisco Jimenez Forteza, Swetha Bhagwat +2
In any extension of General Relativity (GR), extra fundamental degrees of freedom couple to gravity. Besides deforming GR forecasts in a theory-dependent way, this coupling generic…
Low evidence for ringdown overtone in GW150914 when marginalizing over time and sky location uncertainty
Alex Correia, Yi-Fan Wang, Julian Westerweck +1
Tests of the no-hair theorem using astrophysical black holes involve the detection of at least two quasi-normal modes (QNMs) in the gravitational wave emitted by a perturbed black…
Spectroscopy for asymmetric binary black hole mergers
Jahed Abedi, Collin D. Capano, Shilpa Kastha +5
We study Bayesian inference of black hole ringdown modes for simulated binary black hole signals. We consider to what extent different fundamental ringdown modes can be identified…
A gating-and-inpainting perspective on GW150914 ringdown overtone: understanding the data analysis systematics
Yi-Fan Wang, Collin D. Capano, Jahed Abedi +5
We revisit the recent debate on the evidence for an overtone in the black hole ringdown of GW150914 using an independent data-analysis pipeline. By gating and inpainting the data,…
Estimating False Alarm Rates of Sub-Dominant Quasi-normal Modes in GW190521
Collin D. Capano, Jahed Abedi, Shilpa Kastha +6
A major aim of gravitational wave astronomy is to test observationally the Kerr nature of black holes. The strongest such test, with minimal additional assumptions, is provided by…
Model systematics in time domain tests of binary black hole evolution
Shilpa Kastha, Collin D. Capano, Julian Westerweck +3
We perform several consistency tests between different phases of binary black hole dynamics; the inspiral, the merger, and the ringdown on the gravitational wave events GW150914 an…
Sub-atomic constraints on the Kerr geometry of GW150914
Julian Westerweck, Yotam Sherf, Collin D. Capano +1
We obtain stringent constraints on near-horizon deviations of a black hole from the Kerr geometry by performing a long-duration Bayesian analysis of the gravitational-wave data imm…
A multimode quasi-normal spectrum from a perturbed black hole
Collin D. Capano, Miriam Cabero, Julian Westerweck +6
When two black holes merge, the late stage of gravitational wave emission is a superposition of exponentially damped sinusoids. According to the black hole no-hair theorem, this ri…
The next decade of black hole spectroscopy
Miriam Cabero, Julian Westerweck, Collin D. Capano +3
Gravitational wave observations of the ringdown of the remnant black hole in a binary black hole coalescence provide a unique opportunity of confronting the black hole no-hair theo…
Parameter estimation for black hole echo signals and their statistical significance
Alex B. Nielsen, Collin D. Capano, Ofek Birnholtz +1
Searching for black hole echo signals with gravitational waves provides a means of probing the near-horizon regime of these objects. We demonstrate a pipeline to efficiently search…
Low significance of evidence for black hole echoes in gravitational wave data
Julian Westerweck, Alex B. Nielsen, Ofek Fischer-Birnholtz +6
Recent detections of merging black holes allow observational tests of the nature of these objects. In some proposed models, non-trivial structure at or near the black hole horizon…
Comments on: "Echoes from the abyss: Evidence for Planck-scale structure at black hole horizons"
Gregory Ashton, Ofek Birnholtz, Miriam Cabero +7
Recently, Abedi, Dykaar and Afshordi claimed evidence for a repeating damped echo signal following the binary black hole merger gravitational-wave events recorded in the first obse…