Search Results for author:
Found 27 papers, 9 papers with code
Structure of neutron stars in massive scalar-tensor gravity
We compute families of spherically symmetric neutron-star models in two-derivative scalar-tensor theories of gravity with a massive scalar field.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Gravitational-wave selection effects using neural-network classifiers
We present a novel machine-learning approach to estimate selection effects in gravitational-wave observations.
Endpoint of the up-down instability in precessing binary black holes
We finally apply these findings to a simple astrophysical population of binary black holes where a formation mechanism aligns the spins without preference for co- or counter-alignment, as might be the case for stellar-mass black holes embedded in the accretion disk of a supermassive black hole.
General Relativity and Quantum Cosmology Astrophysics of Galaxies High Energy Astrophysical Phenomena
Machine-learning interpolation of population-synthesis simulations to interpret gravitational-wave observations: a case study
We report on advances to interpret current and future gravitational-wave events in light of astrophysical simulations.
High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
Escape speed of stellar clusters from multiple-generation black-hole mergers in the upper mass gap
Pair instabilities in supernovae might prevent the formation of black holes with masses between $\sim 50 M_\odot$ and $\sim 130 M_\odot$.
High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
Surrogate models for precessing binary black hole simulations with unequal masses
The final black hole model, \RemnantModel, models the mass, spin, and recoil kick velocity of the remnant black hole.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Multiband gravitational-wave event rates and stellar physics
We use population synthesis simulations of isolated binary stars to explore some of the stellar physics that could be constrained with multiband events, and we show that specific formation pathways might be overrepresented in multiband events compared to ground-only detections.
High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
Wide precession: binary black-hole spins repeatedly oscillating from full alignment to full anti-alignment
Within the framework of 2PN black-hole binary spin precession, we explore configurations where one of the two spins oscillates from being completely aligned with the orbital angular momentum to being completely anti-aligned with it during a single precession cycle.
General Relativity and Quantum Cosmology Astrophysics of Galaxies High Energy Astrophysical Phenomena
High-accuracy mass, spin, and recoil predictions of generic black-hole merger remnants
We present accurate fits for the remnant properties of generically precessing binary black holes, trained on large banks of numerical-relativity simulations.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Spin orientations of merging black holes formed from the evolution of stellar binaries
We study the expected spin misalignments of merging binary black holes (BHs) formed in isolation by combining state-of-the-art population synthesis models with efficient post-Newtonian evolutions, thus tracking sources from stellar formation to gravitational-wave detection.
High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
Optimizing LIGO with LISA forewarnings to improve black-hole spectroscopy
The early inspiral of massive stellar-mass black-hole binaries merging in LIGO's sensitivity band will be detectable at low frequencies by the upcoming space mission LISA.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Mining Gravitational-wave Catalogs To Understand Binary Stellar Evolution: A New Hierarchical Bayesian Framework
Catalogs of stellar-mass compact binary systems detected by ground-based gravitational-wave instruments (such as LIGO and Virgo) will offer insights into the demographics of progenitor systems and the physics guiding stellar evolution.
High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology Data Analysis, Statistics and Probability
Black-hole kicks from numerical-relativity surrogate models
Our procedure uses a numerical-relativity surrogate model to obtain the gravitational waveform given a set of binary parameters, then from this waveform we directly integrate the gravitational-wave linear momentum flux.
General Relativity and Quantum Cosmology Astrophysics of Galaxies High Energy Astrophysical Phenomena
Surprises from the spins: astrophysics and relativity with detections of spinning black-hole mergers
Measurements of black-hole spins are of crucial importance to fulfill the promise of gravitational-wave astronomy.
High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
Impact of Bayesian prior on the characterization of binary black hole coalescences
In a regime where data are only mildly informative, prior choices can play a significant role in Bayesian statistical inference, potentially affecting the inferred physics.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Nutational resonances, transitional precession, and precession-averaged evolution in binary black-hole systems
We use analytic solutions for generic spin precession at 2PN order to derive Fourier series for the total and orbital angular momenta in which each term is a sinusoid with frequency $\Omega - n\omega$ for integer $n$.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Are merging black holes born from stellar collapse or previous mergers?
Advanced LIGO detectors at Hanford and Livingston made two confirmed and one marginal detection of binary black holes during their first observing run.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
On the equal-mass limit of precessing black-hole binaries
We analyze the inspiral dynamics of equal-mass precessing black-hole binaries using multi-timescale techniques.
General Relativity and Quantum Cosmology Astrophysics of Galaxies High Energy Astrophysical Phenomena
Black hole kicks as new gravitational wave observables
Generic black hole binaries radiate gravitational waves anisotropically, imparting a recoil, or kick, velocity to the merger remnant.
General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena
PRECESSION: Dynamics of spinning black-hole binaries with python
We present the numerical code PRECESSION: a new open-source python module to study the dynamics of precessing black-hole binaries in the post-Newtonian regime.
High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology
Distinguishing black-hole spin-orbit resonances by their gravitational wave signatures. II: Full parameter estimation
Gravitational waves from coalescing binary black holes encode the evolution of their spins prior to merger.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Precessional instability in binary black holes with aligned spins
In this work, we show that these solutions can be unstable when the spin of the higher-mass black hole is aligned with the orbital angular momentum and the spin of the lower-mass black hole is anti-aligned.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Multi-timescale analysis of phase transitions in precessing black-hole binaries
The dynamics of precessing binary black holes (BBHs) in the post-Newtonian regime has a strong timescale hierarchy: the orbital timescale is very short compared to the spin-precession timescale which, in turn, is much shorter than the radiation-reaction timescale on which the orbit is shrinking due to gravitational-wave emission.
General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena
Spin alignment and differential accretion in merging black hole binaries
While binary migration is due to angular-momentum transfer within the circumbinary disc, the spin-alignment process is driven by the mass accreting on to each black hole.
Astrophysics of Galaxies High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
Effective potentials and morphological transitions for binary black-hole spin precession
We derive an effective potential for binary black-hole (BBH) spin precession at second post-Newtonian order.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
Missing black holes in brightest cluster galaxies as evidence for the occurrence of superkicks in nature
We investigate the consequences of superkicks on the population of supermassive black holes (SMBHs) in the Universe residing in brightest cluster galaxies (BCGs).
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
Resonant-plane locking and spin alignment in stellar-mass black-hole binaries: a diagnostic of compact-binary formation
Under the plausible assumption that tidal interactions are efficient at aligning the spins of few-solar mass black-hole progenitors with the orbital angular momentum, we find that black-hole spins should be expected to preferentially lie in a plane when they become detectable by gravitational-wave interferometers.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
