Fabio Antonini
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View article: Populations Of Binary Compact Objects: The Present (GWTC-4) And The Future (Einstein Telescope)
Populations Of Binary Compact Objects: The Present (GWTC-4) And The Future (Einstein Telescope) Open
Plenary talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/)
View article: Hierarchical triples versus globular clusters: binary black hole merger eccentricity distributions compete and evolve with redshift
Hierarchical triples versus globular clusters: binary black hole merger eccentricity distributions compete and evolve with redshift Open
The formation mechanisms of merging binary black holes (BBHs) observed by the LIGO–Virgo–KAGRA collaboration remain uncertain. Detectable eccentricity provides a powerful diagnostic for distinguishing between different formation channels, …
View article: GW241011 and GW241110: Exploring Binary Formation and Fundamental Physics with Asymmetric, High-spin Black Hole Coalescences
GW241011 and GW241110: Exploring Binary Formation and Fundamental Physics with Asymmetric, High-spin Black Hole Coalescences Open
We report the observation of gravitational waves from two binary black hole coalescences during the fourth observing run of the LIGO–Virgo–KAGRA detector network, GW241011 and GW241110. The sources of these two signals are characterized by…
View article: Inferring the pair-instability mass gap from gravitational wave data
Inferring the pair-instability mass gap from gravitational wave data Open
We use hierarchical Bayesian inference with nonparametric Gaussian process models to investigate the effective inspiral spin parameter, χeff, as a function of primary black hole mass in the third gravitational-wave transient catalog (GWTC-…
View article: Gravitational waves reveal the pair-instability mass gap and constrain nuclear burning in massive stars
Gravitational waves reveal the pair-instability mass gap and constrain nuclear burning in massive stars Open
Stellar evolution theory predicts that electron–positron pair production in the cores of massive stars triggers unstable thermonuclear explosions that prevent the direct formation of black holes above about 50M?, creating a “pair-instabili…
View article: Gravitational waves reveal the pair-instability mass gap and constrain nuclear burning in massive stars
Gravitational waves reveal the pair-instability mass gap and constrain nuclear burning in massive stars Open
Stellar evolution theory predicts that electron--positron pair production in the cores of massive stars triggers unstable thermonuclear explosions that prevent the direct formation of black holes above about $50\,M_\odot$, creating a ``pai…
View article: Hierarchical Triples vs. Globular Clusters: Binary black hole merger eccentricity distributions compete and evolve with redshift
Hierarchical Triples vs. Globular Clusters: Binary black hole merger eccentricity distributions compete and evolve with redshift Open
The formation mechanisms of merging binary black holes (BBHs) observed by the LIGO-Virgo-KAGRA collaboration remain uncertain. Detectable eccentricity provides a powerful diagnostic for distinguishing between different formation channels, …
View article: Binary-single interactions with different mass ratios
Binary-single interactions with different mass ratios Open
Context . Dynamical interactions in star clusters are an efficient mechanism to produce the coalescing binary black holes (BBHs) that have been detected with gravitational waves (GWs). Aims . We want to understand how BBH coalescence can o…
View article: Properties of black hole-star binaries formed in <i>N</i>-body simulations of massive star clusters: implications for <i>Gaia</i> black holes
Properties of black hole-star binaries formed in <i>N</i>-body simulations of massive star clusters: implications for <i>Gaia</i> black holes Open
We investigate black hole–star binaries formed in N-body simulations of massive, dense star clusters. We simulate 32 clusters with varying initial masses ($10^{4}~\mathrm{{\rm M}_{\odot }}$ to $10^{6}~\mathrm{{\rm M}_{\odot }}$), densities…
View article: Formation and evolution of binary black holes in <i>N</i>-body simulations of star clusters with up to two million stars
Formation and evolution of binary black holes in <i>N</i>-body simulations of star clusters with up to two million stars Open
Understanding binary black hole (BBH) dynamics in dense star clusters is key to interpreting the gravitational wave detections by Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo. Here, we perform N-body simulations of …
View article: Gravitational wave inference of star cluster properties from intermediate-mass black hole mergers
Gravitational wave inference of star cluster properties from intermediate-mass black hole mergers Open
Next-generation ground-based gravitational wave observatories will observe mergers of intermediate-mass black holes (IMBHs) out to high redshift. Such IMBHs can form through runaway tidal encounters in the cores of dense stellar clusters. …
View article: Star Cluster Population of High Mass Black Hole Mergers in Gravitational Wave Data
Star Cluster Population of High Mass Black Hole Mergers in Gravitational Wave Data Open
Stellar evolution theories predict a gap in the black hole birth mass spectrum as the result of pair instability processes in the cores of massive stars. This gap, however, is not seen in the binary black hole masses inferred from gravitat…
View article: The impact of astrophysical priors on parameter inference for GW230529
The impact of astrophysical priors on parameter inference for GW230529 Open
We investigate the effects of prior selection on the inferred mass and spin parameters of the neutron star–black hole merger GW230529_181500. Specifically, we explore models motivated by astrophysical considerations, including massive bina…
View article: Reconstructing the Genealogy of LIGO-Virgo Black Holes
Reconstructing the Genealogy of LIGO-Virgo Black Holes Open
We propose a Bayesian inference framework to predict the merger history of LIGO-Virgo binary black holes (BHs), whose binary components may have undergone hierarchical mergers in the past. The framework relies on numerical relativity predi…
View article: TSE: A triple stellar evolution code
TSE: A triple stellar evolution code Open
Most massive stars are found in hierarchical triples or higher multiplicity systems in which a
close inner binary is orbited by one or more distant companions (Moe & Di Stefano, 2017). A
distant companion may significantly alter the evolut…
View article: Properties of black hole-star binaries formed in $N$-body simulations of massive star clusters: implications for Gaia black holes
Properties of black hole-star binaries formed in $N$-body simulations of massive star clusters: implications for Gaia black holes Open
We investigate black hole-star binaries formed in $N$-body simulations of massive, dense star clusters. We simulate 32 clusters with varying initial masses ($10^{4}~\rm M_{\odot}$ to $10^{6}~\rm M_{\odot}$), densities ($1200~\rm M_{\odot}~…
View article: Formation and evolution of binary black holes in $N$-body simulations of star clusters with up to two million stars
Formation and evolution of binary black holes in $N$-body simulations of star clusters with up to two million stars Open
Understanding binary black hole (BBH) dynamics in dense star clusters is key to interpreting the gravitational wave detections by LIGO and Virgo. Here, we perform $N$-body simulations of star clusters, focusing on BBH formation mechanisms,…
View article: The Impact of Astrophysical Priors on Parameter Inference for GW230529
The Impact of Astrophysical Priors on Parameter Inference for GW230529 Open
We investigate the effects of prior selection on the inferred mass and spin parameters of the neutron star-black hole merger GW230529\_181500. Specifically, we explore models motivated by astrophysical considerations, including massive bin…
View article: A Star Cluster Population of High Mass Black Hole Mergers in Gravitational Wave Data
A Star Cluster Population of High Mass Black Hole Mergers in Gravitational Wave Data Open
Stellar evolution theories predict a gap in the black hole birth mass spectrum as the result of pair instability processes in the cores of massive stars.This gap, however, is not seen in the binary black hole masses inferred from gravitati…
View article: Reconstructing the Genealogy of LIGO-Virgo Black Holes
Reconstructing the Genealogy of LIGO-Virgo Black Holes Open
We propose a Bayesian inference framework to predict the merger history of LIGO-Virgo binary black holes (BHs), whose binary components may have undergone hierarchical mergers in the past. The framework relies on numerical relativity predi…
View article: Binary-single interactions with different mass ratios
Binary-single interactions with different mass ratios Open
Dynamical interactions in star clusters are an efficient mechanism to produce the coalescing binary black holes (BBHs) that have been detected with gravitational waves (GWs). We want to understand how BBH coalescence can occur during - or …
View article: Black hole binary mergers in dense star clusters: the importance of primordial binaries
Black hole binary mergers in dense star clusters: the importance of primordial binaries Open
Dense stellar clusters are expected to house the ideal conditions for binary black hole (BBH) formation, both through binary stellar evolution and through dynamical encounters. We use theoretical arguments as well as N-body simulations to …
View article: Imprints of massive black-hole binaries on neighbouring decihertz gravitational-wave sources
Imprints of massive black-hole binaries on neighbouring decihertz gravitational-wave sources Open
The most massive black holes in our Universe form binaries at the centre of merging galaxies. The recent evidence for a gravitational-wave (GW) background from pulsar timing may constitute the first observation that these supermassive blac…
View article: Double black hole mergers in nuclear star clusters: eccentricities, spins, masses, and the growth of massive seeds
Double black hole mergers in nuclear star clusters: eccentricities, spins, masses, and the growth of massive seeds Open
We investigate the formation of intermediate mass black holes (IMBHs) through hierarchical mergers of stellar origin black holes (BHs), as well as BH mergers formed dynamically in nuclear star clusters. Using a semi-analytical approach tha…
View article: Black hole binary mergers in dense star clusters: the importance of primordial binaries
Black hole binary mergers in dense star clusters: the importance of primordial binaries Open
Dense stellar clusters are expected to house the ideal conditions for binary black hole (BBH) formation, both through binary stellar evolution and through dynamical encounters. We use theoretical arguments as well as $N$-body simulations t…
View article: Double black hole mergers in nuclear star clusters: eccentricities, spins, masses, and the growth of massive seeds
Double black hole mergers in nuclear star clusters: eccentricities, spins, masses, and the growth of massive seeds Open
We investigate the formation of intermediate mass black holes (IMBHs) through hierarchical mergers of stellar origin black holes (BHs), as well as BH mergers formed dynamically in nuclear star clusters. Using a semi-analytical approach whi…
View article: Coalescing black hole binaries from globular clusters: mass distributions and comparison to gravitational wave data from GWTC-3
Coalescing black hole binaries from globular clusters: mass distributions and comparison to gravitational wave data from GWTC-3 Open
We use our cluster population model, cBHBd, to explore the mass distribution of merging black hole binaries formed dynamically in globular clusters. We include in our models the effect of mass growth through hierarchical mergers and compar…
View article: Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3
Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3 Open
We report on the population properties of compact binary mergers inferred from gravitational-wave observations of these systems during the first three LIGO-Virgo observing runs. The Gravitational-Wave Transient Catalog 3 (GWTC-3) contains …
View article: Evolution of massive stellar triples and implications for compact object binary formation
Evolution of massive stellar triples and implications for compact object binary formation Open
Most back hole and neutron star progenitors are found in triples or higher multiplicity systems. Here, we present a new triple stellar evolution code, ${\tt TSE}$, which simultaneously takes into account the physics of the stars and their …