Description
Chair: Toni Font
The observed distributions of the source properties from gravitational-wave detections are biased due to the selection effects and detection criteria in the detections, analogous to the Malmquist bias. In this work, this observation bias is investigated through its fundamental statistical and physical origins. A semi-analytical formulation for its estimation for a network of detectors is...
Ultralight bosons are an encouraging class of dark matter candidate particles, which may form long-lived bosonic clouds surrounding rotating black holes via superradiance. We compute the shifts in the gravitational quasinormal-mode frequencies of supermassive black holes due to the presence of such a bosonic cloud. We then use the modified ringdown waveform of a supermassive black hole from a...
The origin, environment, and evolution of stellar-mass black hole binaries are still a mystery. One of the proposed binary formation mechanisms is manifest in dynamical interactions between multiple black holes. A resulting framework of these dynamical interactions is the so-called hierarchical triple merger scenario, which happens when three black holes become gravitationally bound, causing...
Current gravitational wave (GW) surveys of binary black hole (BBH) mergers provide unprecedented probes of the dynamics in extreme gravitational fields and relativistic velocities.
It has been proposed that such compact objects may display exotic characteristics and could produce repeated GW pulses of widely uncertain morphology (echoes) in the post-merger phase. A detection of echoes would be...
Stellar mass binary black holes are the most important sources of gravitational waves for current LIGO-Virgo-Kagra detectors. We analyze about a thousand globular cluster (GC) models simulated using the MOCCA Monte Carlo code for star cluster evolution to study black hole - black hole interactions in these dense stellar systems that can lead to gravitational wave emission. We extracted...
The coherent WaveBurst (cWB) pipeline implements a minimally-modelled search to find a coherent response in the network of gravitational wave detectors of the LIGO-Virgo Collaboration in the time-frequency domain. Here we describe an extension of the cWB analysis to detect spectral features beyond the main quadrupolar emission of gravitational waves during the inspiral phase of compact binary...
Advanced LIGO and Virgo have delivered a conclusive gravitational-wave signal consistent with compact binary mergers in the intermediate-mass black-hole range and as well as several lower significance triggers. These signals have challenged in several ways our vanilla analysis methods, all done within the “canonical” paradigm of quasi-circular black hole mergers. First, under such assumption,...
