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View article: Realistic Predictions for Gaia Black Hole Discoveries: Comparison of Isolated Binary and Dynamical Formation Models
Realistic Predictions for Gaia Black Hole Discoveries: Comparison of Isolated Binary and Dynamical Formation Models Open
Astrometry from Gaia has enabled discovery of three dormant black holes (BHs) in au-scale binaries. Numerous models have been proposed to explain their formation, including several that have forecasted Gaia detections. However, previous wo…
View article: MAGICS. III. Seeds Sink Swiftly: Nuclear Star Clusters Dramatically Accelerate Seed Black Hole Mergers
MAGICS. III. Seeds Sink Swiftly: Nuclear Star Clusters Dramatically Accelerate Seed Black Hole Mergers Open
Merger rate predictions of massive black hole (MBH) seeds from large-scale cosmological simulations differ widely, with recent studies highlighting the challenge of low-mass MBH seeds failing to reach the galactic center, a phenomenon know…
View article: The initial mass-remnant mass relation for core collapse supernovae
The initial mass-remnant mass relation for core collapse supernovae Open
Context. The first direct detection of gravitational waves in 2015 marked the beginning of a new era for the study of compact objects. Upcoming detectors, such as the Einstein Telescope, are expected to add thousands of binary coalescences…
View article: MAGICS. II. Seed Black Holes Stripped of Their Surrounding Stars Do Not Sink
MAGICS. II. Seed Black Holes Stripped of Their Surrounding Stars Do Not Sink Open
Massive black hole (MBH) seed mergers are expected to be among the loudest sources of gravitational waves detected by the Laser Interferometer Space Antenna, providing a unique window into the birth and early growth of MBHs. We present the…
View article: Realistic predictions for Gaia black hole discoveries: comparison of isolated binary and dynamical formation models
Realistic predictions for Gaia black hole discoveries: comparison of isolated binary and dynamical formation models Open
Astrometry from Gaia has enabled discovery of three dormant black holes (BHs) in au-scale binaries. Numerous models have been proposed to explain their formation, including several that have forecasted Gaia detections. However, previous wo…
View article: The initial mass-remnant mass relation for core collapse supernovae
The initial mass-remnant mass relation for core collapse supernovae Open
The first direct detection of gravitational waves in 2015 marked the beginning of a new era for the study of compact objects. Upcoming detectors, such as the Einstein Telescope, are expected to add thousands of binary coalescences to the l…
View article: MAGICS II. Seed black holes stripped of their surrounding stars do not sink
MAGICS II. Seed black holes stripped of their surrounding stars do not sink Open
MBH seed mergers are expected to be among the loudest sources of gravitational waves detected by the Laser Interferometer Space Antenna (LISA), providing a unique window into the birth and early growth of SMBH. We present the MAGICS-II sim…
View article: MAGICS III. Seeds sink swiftly: nuclear star clusters dramatically accelerate seed black hole mergers
MAGICS III. Seeds sink swiftly: nuclear star clusters dramatically accelerate seed black hole mergers Open
Merger rate predictions of Massive Black Hole (MBH) seeds from large-scale cosmological simulations differ widely, with recent studies highlighting the challenge of low-mass MBH seeds failing to reach the galactic center, a phenomenon know…
View article: A machine learning framework to generate star cluster realisations
A machine learning framework to generate star cluster realisations Open
Computational astronomy has reached the stage where running a gravitational $N$-body simulation of a stellar system, such as a Milky Way star cluster, is computationally feasible, but a major limiting factor that remains is the ability to …
View article: The cosmic rate of pair-instability supernovae
The cosmic rate of pair-instability supernovae Open
Pair-instability supernovae (PISNe) have crucial implications for many astrophysical topics, including the search for very massive stars, the black hole mass spectrum, and galaxy chemical enrichment. To this end, we need to understand wher…
View article: The boring history of <i>Gaia</i> BH3 from isolated binary evolution
The boring history of <i>Gaia</i> BH3 from isolated binary evolution Open
Gaia BH3 is the first observed dormant black hole (BH) with a mass of ≈30 M ⊙ , and it represents the first confirmation that such massive BHs are associated with metal-poor stars. Here, we explore the isolated binary formation channel for…
View article: Young Star Clusters Dominate the Production of Detached Black Hole–Star Binaries
Young Star Clusters Dominate the Production of Detached Black Hole–Star Binaries Open
The recent discovery of two detached black hole–star (BH–star) binaries from Gaia’s third data release has sparked interest in understanding the formation mechanisms of these systems. We investigate the formation of these systems by dynami…
View article: The search for the lost attractor
The search for the lost attractor Open
N-body systems characterized by inverse square attractive forces may display a self similar collapse known as the gravo-thermal catastrophe. In star clusters, collapse is halted by binary stars, and a large fraction of Milky Way clusters m…
View article: Dynamical formation of <i>Gaia</i> BH1 in a young star cluster
Dynamical formation of <i>Gaia</i> BH1 in a young star cluster Open
Gaia BH1, the first quiescent black hole (BH) detected from Gaia data, poses a challenge to most binary evolution models: its current mass ratio is ≈0.1, and its orbital period seems to be too long for a post-common envelope system and too…
View article: Dynamical formation of $Gaia$ BH1 in a young star cluster
Dynamical formation of $Gaia$ BH1 in a young star cluster Open
$Gaia$ BH1, the first quiescent black hole (BH) detected from $Gaia$ data, poses a challenge to most binary evolution models: its current mass ratio is $\approx{0.1}$, and its orbital period seems to be too long for a post-common envelope …
View article: Young Star Clusters Dominate the Production of Detached Black Hole-Star Binaries
Young Star Clusters Dominate the Production of Detached Black Hole-Star Binaries Open
The recent discovery of two detached black hole-star (BH-star) binaries from Gaia's third data release has sparkled interest in understanding the formation mechanisms of these systems. We investigate the formation of these systems by dynam…
View article: Dynamics of intermediate mass black holes in globular clusters
Dynamics of intermediate mass black holes in globular clusters Open
Context. We recently introduced a new method for simulating collisional gravitational N -body systems with approximately linear time scaling with N . Our method is based on the multi-particle collision (MPC) scheme, previously applied in f…
View article: Dynamics of intermediate mass black holes in globular clusters. Wander radius and anisotropy profiles
Dynamics of intermediate mass black holes in globular clusters. Wander radius and anisotropy profiles Open
We recently introduced a new method for simulating collisional gravitational N-body systems with approximately linear time scaling with $N$, based on the Multi-Particle Collision (MPC) scheme, previously applied in Plasma Physics. We simul…
View article: Gravitational background from dynamical binaries and detectability with 2G detectors
Gravitational background from dynamical binaries and detectability with 2G detectors Open
We study the impact of young clusters on the gravitational wave background from compact binary coalescence. We simulate a catalog of sources from population I/II isolated binary stars and stars born in young clusters, corresponding to one …
View article: Dynamics of binary black holes in young star clusters: the impact of cluster mass and long-term evolution
Dynamics of binary black holes in young star clusters: the impact of cluster mass and long-term evolution Open
Dynamical interactions in dense star clusters are considered one of the most effective formation channels of binary black holes (BBHs). Here, we present direct $N-$body simulations of two different star cluster families: low-mass ($\sim{50…
View article: Compact object mergers in hierarchical triples from low-mass young star clusters
Compact object mergers in hierarchical triples from low-mass young star clusters Open
A binary star orbited by an outer companion constitutes a hierarchical triple system. The outer body may excite the eccentricity of the inner binary through the von Zeipel-Lidov-Kozai (ZLK) mechanism, triggering the gravitational wave (GW)…
View article: The Black Hole Mass Function Across Cosmic Times. I. Stellar Black Holes and Light Seed Distribution
The Black Hole Mass Function Across Cosmic Times. I. Stellar Black Holes and Light Seed Distribution Open
This is the first paper in a series aimed at modeling the black hole (BH) mass function, from the stellar to the intermediate to the (super)massive regime. In the present work, we focus on stellar BHs and provide an ab initio computation o…
View article: Gravitational background from dynamical binaries and detectability with\n 2G detectors
Gravitational background from dynamical binaries and detectability with\n 2G detectors Open
We study the impact of young clusters on the gravitational wave background\nfrom compact binary coalescence. We simulate a catalog of sources from\npopulation I/II isolated binary stars and stars born in young clusters,\ncorresponding to o…
View article: GW190521 formation via three-body encounters in young massive star clusters
GW190521 formation via three-body encounters in young massive star clusters Open
GW190521 is the most massive binary black hole (BBH) merger observed to date, and its primary component lies in the pair-instability (PI) mass gap. Here, we investigate the formation of GW190521-like systems via three-body encounters in yo…
View article: New insights on binary black hole formation channels after GWTC-2: young star clusters versus isolated binaries
New insights on binary black hole formation channels after GWTC-2: young star clusters versus isolated binaries Open
With the recent release of the Second Gravitational Wave Transient Catalog (GWTC-2), which introduced dozens of new detections, we are at a turning point of gravitational wave astronomy, as we are now able to directly infer constraints on …
View article: Intermediate-mass black holes from stellar mergers in young star clusters
Intermediate-mass black holes from stellar mergers in young star clusters Open
Intermediate-mass black holes (IMBHs) in the mass range $10^2\!-\!10^5\, \mathrm{M_{\odot }}$ bridge the gap between stellar black holes (BHs) and supermassive BHs. Here, we investigate the possibility that IMBHs form in young star cluster…
View article: Dynamics of binary black holes in low-mass young star clusters
Dynamics of binary black holes in low-mass young star clusters Open
Young star clusters are dynamically active stellar systems and are a common birthplace for massive stars. Low-mass star clusters (∼300–103 M⊙) are more numerous than massive systems and are characterized by a two-body relaxation time-scale…
View article: The impact of binaries on the evolution of star clusters from turbulent molecular clouds
The impact of binaries on the evolution of star clusters from turbulent molecular clouds Open
Most of massive stars form in binary or higher order systems in clumpy, substructured clusters. In the very first phases of their life, these stars are expected to interact with the surrounding environment, before being released to the fie…
View article: Hierarchical black hole mergers in young, globular and nuclear star clusters: the effect of metallicity, spin and cluster properties
Hierarchical black hole mergers in young, globular and nuclear star clusters: the effect of metallicity, spin and cluster properties Open
We explore hierarchical black hole (BH) mergers in nuclear star clusters (NSCs), globular clusters (GCs) and young star clusters (YSCs), accounting for both original and dynamically assembled binary BHs (BBHs). We find that the median mass…
View article: New insights on binary black hole formation channels after GWTC-2: young\n star clusters versus isolated binaries
New insights on binary black hole formation channels after GWTC-2: young\n star clusters versus isolated binaries Open
With the recent release of the second gravitational-wave transient catalogue\n(GWTC-2), which introduced dozens of new detections, we are at a turning point\nof gravitational wave astronomy, as we are now able to directly infer\nconstraint…