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Gravitational wave inference of star cluster properties from intermediate-mass black hole mergers
Konstantinos Kritos, Luca Reali, Ken K. Y. Ng +2
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 runawa…
A Star Cluster Population of High Mass Black Hole Mergers in Gravitational Wave Data
Fabio Antonini, Isobel M. Romero-Shaw, Thomas Callister
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 s…
Imprints of massive black-hole binaries on neighbouring decihertz gravitational-wave sources
Jakob Stegmann, Lorenz Zwick, Sander M. Vermeulen +2
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 co…
Double black hole mergers in nuclear star clusters: eccentricities, spins, masses, and the growth of massive seeds
Debatri Chattopadhyay, Jakob Stegmann, Fabio Antonini +2
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…
Coalescing black hole binaries from globular clusters: mass distributions and comparison to gravitational wave data from GWTC-3
Fabio Antonini, Mark Gieles, Fani Dosopoulou +1
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 ef…
Modelling the formation of the first two neutron star-black hole mergers, GW200105 and GW200115: metallicity, chirp masses and merger remnant spins
Debatri Chattopadhyay, Simon Stevenson, Floor Broekgaarden +2
The two neutron star-black hole mergers (GW200105 and GW200115) observed in gravitational waves by advanced LIGO and Virgo, mark the first ever discovery of such binaries in nature…
The population of merging compact binaries inferred using gravitational waves through GWTC-3
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1634
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. Th…
Flipping spins in mass transferring binaries and origin of spin-orbit misalignment in binary black holes
Jakob Stegmann, Fabio Antonini
Close stellar binaries are prone to undergo a phase of stable mass transfer in which a star loses mass to its companion. Assuming that the donor star loses mass along the instantan…
One Channel to Rule Them All? Constraining the Origins of Binary Black Holes using Multiple Formation Pathways
Michael Zevin, Simone S. Bavera, Christopher P. L. Berry +7
The second LIGO-Virgo catalog of gravitational wave transients has more than quadrupled the observational sample of binary black holes. We analyze this catalog using a suite of fiv…
Merger rate of black hole binaries from globular clusters: theoretical error bars and comparison to gravitational wave data from GWTC-2
Fabio Antonini, Mark Gieles
Black hole binaries formed dynamically in globular clusters are believed to be one of the main sources of gravitational waves in the Universe. Here, we use our new population synth…
Population synthesis of black hole binary mergers from star clusters
Fabio Antonini, Mark Gieles
Black hole (BH) binary mergers formed through dynamical interactions in dense star clusters are believed to be one of the main sources of gravitational waves for Advanced LIGO and…
Black hole growth through hierarchical black hole mergers in dense star clusters: implications for gravitational wave detections
Fabio Antonini, Mark Gieles, Alessia Gualandris
In a star cluster with a sufficiently large escape velocity, black holes (BHs) that are produced by BH mergers can be retained, dynamically form new BH binaries, and merge again. T…
Millisecond pulsars and the gamma-ray excess in Andromeda
Giacomo Fragione, Fabio Antonini, Oleg Y. Gnedin
The Fermi Gamma-Ray Space Telescope has provided evidence for diffuse gamma-ray emission in the central parts of the Milky Way and the Andromeda galaxy. This excess has been interp…
The impact of vector resonant relaxation on the evolution of binaries near a massive black hole: implications for gravitational wave sources
Adrian S. Hamers, Ben Bar-Or, Cristobal Petrovich +1
Binaries within the sphere of influence of a massive black hole (MBH) in galactic nuclei are susceptible to the Lidov-Kozai (LK) mechanism, which can drive orbits to high eccentric…
A Triple Origin for the Heavy and Low-Spin Binary Black Holes Detected by LIGO/Virgo
Carl L. Rodriguez, Fabio Antonini
We explore the masses, merger rates, eccentricities, and spins for field binary black holes driven to merger by a third companion through the Lidov-Kozai mechanism. Using a populat…
Precessional dynamics of black hole triples: binary mergers with near-zero effective spin
Fabio Antonini, Carl L. Rodriguez, Cristobal Petrovich +1
The binary black hole mergers detected by Advanced LIGO/Virgo have shown no evidence of large black hole spins. However, because LIGO/Virgo best measures the effective combination…
Greatly enhanced merger rates of compact-object binaries in non-spherical nuclear star clusters
Cristobal Petrovich, Fabio Antonini
The Milky Way and a significant fraction of galaxies are observed to host a central Massive Black Hole (MBH) embedded in a non-spherical nuclear star cluster. We study the secular…
body dynamics of Intermediate mass-ratio inspirals in globular clusters
Carl-Johan Haster, Fabio Antonini, Vicky Kalogera +1
The intermediate mass-ratio inspiral of a stellar compact remnant into an intermediate mass black hole (IMBH) can produce a gravitational wave (GW) signal that is potentially detec…
Merging black hole binaries in galactic nuclei: implications for advanced-LIGO detections
Fabio Antonini, Frederic A. Rasio
Motivated by the recent detection of gravitational waves from the black hole binary merger GW150914, we study the dynamical evolution of black holes in galactic nuclei where massiv…
Implications of the delayed 2013 outburst of the ESO 243-49 HLX-1
O. Godet, J. Lombardi, F. Antonini +4
After showing four outbursts spaced by year from 2009 to 2012, the hyper luminous X-ray source ESO 243-49 HLX-1, currently the best intermediate mass black hole (IMBH) can…
Black hole triple dynamics: breakdown of the orbit average approximation and implications for gravitational wave detections
Fabio Antonini, Norman Murray, Seppo Mikkola
Coalescing black hole (BH) binaries forming in the dense core of globular clusters (GCs) are expected to be one the brightest sources of gravitational wave (GW) radiation for the n…