Spectroscopy for asymmetric binary black hole mergers
Organizers
Speaker
Time
Monday, March 18, 2024 3:30 PM - 4:30 PM
Venue
A3-3-301
Online
Zoom 559 700 6085
(BIMSA)
Abstract
We investigate Bayesian inference in the context of black hole ringdown modes for simulated binary black hole signals. We aim to determine the degree to which various essential ringdown modes can be distinguished when conducting black hole spectroscopy. The basis for our simulated signals is the notable high-mass event GW190521. Our findings reveal a significant connection between the mass ratio and the Bayes factors associated with the secondary ringdown modes. Furthermore, our analysis shows that the Bayes factor values, their temporal evolution, and the peak time of the (3,3,0) mode closely align with those observed in the analysis of the actual event GW190521, especially in high-mass ratio systems.
Speaker Intro
Jahed Abedi is a black hole physicist with a broad interest in gravitational physics, bridging both observational and theoretical domains. On the observational side, his work focuses on the search for gravitational wave (GW) echoes and Quasi-Normal Modes (QNMs) in LIGO/Virgo data, while his theoretical research delves into black hole perturbations, QNMs, and Quantum Field Theory (QFT) in curved space-time. Jahed was awarded the 2019 Buchalter Cosmology First Prize for one of his publications where he served as the lead author, reflecting the high impact of his research. He holds a Bachelor's degree in Electrical Engineering, as well as a Master's and PhD in Physics. His research seeks to answer several critical questions: How can a better pipeline be developed to test the Kerr nature of observed Binary Black Hole Mergers through black hole spectroscopy? With improved methods, can additional subdominant Quasi-Normal Modes (QNMs) be detected? Can these results validate previous searches or reveal deviations from General Relativity in GW data? What quantum effects might be expected from black holes, and if they exist, how significant are they? Can such effects be observed? Lastly, how can gravitational wave data confirm or rule out alternatives to classical black holes or their mimickers? Jahed's work continues to push the frontiers of black hole physics, and he remains open to collaborations and inquiries from those interested in his research.