214 citations · 3.9k across the 98 of their papers we have counts for
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Profiling stellar environments of gravitational wave sources
Avinash Tiwari, Aditya Vijaykumar, Shasvath J. Kapadia +2
Gravitational waves (GWs) have enabled direct detections of compact binary coalescences (CBCs). However, their poor sky localisation and the typical lack of observable electromagne…
Remnant masses from 1D+ core-collapse supernovae simulations: bimodal neutron star mass distribution and black holes in the low-mass gap
Luca Boccioli, Giacomo Fragione
The explosion of core-collapse supernovae (CCSNe) is an extremely challenging problem, and there are still large uncertainties regarding which stars lead to successful explosions t…
Accelerated binary black holes in globular clusters: forecasts and detectability in the era of space-based gravitational-wave detectors
Avinash Tiwari, Aditya Vijaykumar, Shasvath J. Kapadia +2
The motion of the center of mass of a coalescing binary black hole (BBH) in a gravitational potential imprints a line-of-sight acceleration (LOSA) onto the emitted gravitational wa…
Neutron star kicks and implications for their rotation at birth
Giacomo Fragione, Abraham Loeb
Neutron stars are born out of core-collapse supernovae, and they are imparted natal kicks at birth as a consequence of asymmetric ejection of matter and possibly neutrinos. Unless…
A long-duration gamma-ray burst of dynamical origin from the nucleus of an ancient galaxy
Andrew J. Levan, Daniele B. Malesani, Benjamin P. Gompertz +29
The majority of long duration ( s) gamma-ray bursts (GRBs) are believed to arise from the collapse of massive stars \cite{Hjorth+03}, with a small proportion created from the m…
On the Tidal Capture of White Dwarfs by Intermediate-mass Black Holes in Dense Stellar Environments
Claire S. Ye, Giacomo Fragione, Rosalba Perna
Intermediate-mass black holes (IMBHs) are the missing link between stellar-mass and supermassive black holes, widely believed to reside in at least some dense star clusters, but no…
LISA Constraints on an Intermediate-Mass Black Hole in the Galactic Centre
Vladimir Strokov, Giacomo Fragione, Emanuele Berti
Galactic nuclei are potential hosts for intermediate-mass black holes (IMBHs), whose gravitational field can affect the motion of stars and compact objects. The absence of observab…
On the Likely Dynamical Origin of GW191109 and of Binary Black Hole Mergers with Negative Effective Spin
Rachel C. Zhang, Giacomo Fragione, Chase Kimball +1
With the growing number of binary black hole (BBH) mergers detected by LIGO/Virgo/KAGRA, several systems have become difficult to explain via isolated binary evolution, having comp…
Constraining the cosmic merger history of intermediate-mass black holes with gravitational wave detectors
Giacomo Fragione, Abraham Loeb
Intermediate-mass black holes (IMBHs) have not been detected beyond any reasonable doubt through either dynamical or accretion signatures. Gravitational waves (GWs) represent an un…
Partial Tidal Disruption of Main-Sequence Stars by Intermediate-Mass Black Holes
Fulya Kıroğlu, James C. Lombardi, Kyle Kremer +3
We study close encounters of a middle-age main-sequence star (modeled using MESA) with massive black holes through hydrodynamic simulations, and explore in particula…
Intermediate-mass Black Holes on the Run from Young Star Clusters
Elena González Prieto, Kyle Kremer, Giacomo Fragione +4
The existence of black holes (BHs) with masses in the range between stellar remnants and supermassive BHs has only recently become unambiguously established. GW190521, a gravitatio…
Millisecond Pulsars in Dense Star Clusters: Evolution, Scaling Relations, and the Galactic-Center Gamma-ray Excess
Claire S. Ye, Giacomo Fragione
The number of millisecond pulsars (MSPs) observed in Milky Way globular clusters has increased explosively in recent years, but the underlying population is still uncertain due to…
Merger rates of intermediate-mass black hole binaries in nuclear star clusters
Giacomo Fragione, Abraham Loeb, Bence Kocsis +1
Repeated mergers of stellar-mass black holes (BHs) in dense star clusters can produce intermediate-mass black holes (IMBHs). In particular, nuclear star clusters at the centers of…
Intermediate-mass black holes born via repeated mergers are unlikely thermodynamically stable
Giacomo Fragione
Black hole (BH) thermodynamics is one of the most fascinating aspects of BH physics. While its direct proof is challenging to observe for astrophysical BHs, gravitational waves (GW…
Mergers of supermassive and intermediate-mass black holes in galactic nuclei from disruptions of star clusters
Giacomo Fragione
Gravitational waves (GWs) offer an unprecedented opportunity to survey the sky and detect mergers of compact objects. While intermediate-mass black holes (IMBHs) have not been dete…
Black hole-neutron star mergers are unlikely multi-messenger sources
Giacomo Fragione
The promise by the LIGO/Virgo/Kagra (LVK) collaboration to detect black hole--neutron star (BH--NS) mergers via gravitational wave (GW) emission has recently been fulfilled with th…
Compact Object Modeling in the Globular Cluster 47 Tucanae
Claire S. Ye, Kyle Kremer, Carl L. Rodriguez +5
The globular cluster 47~Tucanae (47~Tuc) is one of the most massive star clusters in the Milky Way and is exceptionally rich in exotic stellar populations. For several decades it h…
Hunting intermediate-mass black holes with LISA binary radial velocity measurements
Vladimir Strokov, Giacomo Fragione, Kaze W. K. Wong +2
Despite their potential role as massive seeds for quasars, in dwarf galaxy feedback, and in tidal disruption events, the observational evidence for intermediate-mass black holes (I…
Impact of natal kicks on merger rates and spin-orbit misalignments of black hole -- neutron star mergers
Giacomo Fragione, Abraham Loeb, Frederic A. Rasio
The long wait for the detection of merging black hole -- neutron star (BH--NS) binaries is finally over with the announcement by the LIGO/Virgo/Kagra collaboration of GW200105 and…
Micro Tidal Disruption Events in Active Galactic Nuclei
Y. Yang, I. Bartos, G. Fragione +5
Active galactic nuclei (AGNs) can act as black hole assembly lines, funneling some of the stellar-mass black holes from the vicinity of the galactic center into the inner plane of…
Constraining neutron star radii in black hole-neutron star mergers from their electromagnetic counterparts
Giacomo Fragione, Abraham Loeb
Mergers of black hole (BH) and neutron star (NS) binaries are of interest since the emission of gravitational waves (GWs) can be followed by an electromagnetic (EM) counterpart, wh…
Binary black hole mergers from young massive and open clusters: comparison to GWTC-2 gravitational wave data
Giacomo Fragione, Sambaran Banerjee
Several astrophysical scenarios have been proposed to explain the origin of the population of binary black hole (BBH) mergers detected in gravitational waves (GWs) by the LIGO/Virg…
First and second-generation black hole and neutron star mergers in 2+2 quadruples: population statistics
Adrian S. Hamers, Giacomo Fragione, Patrick Neunteufel +1
Recent detections of gravitational waves from mergers of neutron stars (NSs) and black holes (BHs) in the low and high-end mass gap regimes pose a puzzle to standard stellar and bi…
The Observed Rate of Binary Black Hole Mergers can be Entirely Explained by Globular Clusters
Carl L. Rodriguez, Kyle Kremer, Sourav Chatterjee +5
Since the first signal in 2015, the gravitational-wave detections of merging binary black holes (BBHs) by the LIGO and Virgo collaborations (LVC) have completely transformed our un…