158 citations · 1.5k across the 32 of their papers we have counts for
32 papers
A machine learning framework to generate star cluster realisations
George P. Prodan, Mario Pasquato, Giuliano Iorio +4
Context. 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 fea…
Formation of black holes in the pair-instability mass gap: Hydrodynamical simulations of a head-on massive star collision
Alessandro Ballone, Guglielmo Costa, Michela Mapelli +3
The detection of the binary black hole merger GW190521, with primary black hole mass , proved the existence of black holes in the theoretically pr…
Formation of black holes in the pair-instability mass gap: evolution of a post-collision star
Guglielmo Costa, Alessandro Ballone, Michela Mapelli +1
The detection of GW190521 by the LIGO-Virgo collaboration has revealed the existence of black holes (BHs) in the pair-instability (PI) mass gap. Here, we investigate the formation…
Dynamics of binary black holes in young star clusters: the impact of cluster mass and long-term evolution
Stefano Torniamenti, Sara Rastello, Michela Mapelli +3
Dynamical interactions in dense star clusters are considered one of the most effective formation channels of binary black holes (BBHs). Here, we present direct body simulations…
Dynamics of binary black holes in low-mass young star clusters
Sara Rastello, Michela Mapelli, Ugo N. di Carlo +5
Young star clusters are dynamically active stellar systems and are a common birthplace for massive stars. Low-mass star clusters ( M) are more numerous than…
Intermediate mass black holes from stellar mergers in young star clusters
Ugo N. Di Carlo, Michela Mapelli, Mario Pasquato +8
Intermediate mass black holes (IMBHs) in the mass range bridge the gap between stellar black holes (BHs) and supermassive BHs. Here, we investigate…
GW190521 formation via three-body encounters in young massive star clusters
Marco Dall'Amico, Michela Mapelli, Ugo N. Di Carlo +5
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 formati…
The impact of binaries on the evolution of star clusters from turbulent molecular clouds
Stefano Torniamenti, Alessandro Ballone, Michela Mapelli +5
Most of massive stars form in binary or higher-order systems in clumpy, sub-structured clusters. In the very first phases of their life, these stars are expected to interact with t…
Hierarchical black hole mergers in young, globular and nuclear star clusters: the effect of metallicity, spin and cluster properties
Michela Mapelli, Marco Dall'Amico, Yann Bouffanais +8
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 dynamicall…
From hydrodynamics to N-body simulations of star clusters: mergers and rotation
Alessandro Ballone, Stefano Torniamenti, Michela Mapelli +5
We present a new method to obtain more realistic initial conditions for N-body simulations of young star clusters. We start from the outputs of hydrodynamical simulations of molecu…
Measuring the spectral index of turbulent gas with deep learning from projected density maps
Piero Trevisan, Mario Pasquato, Alessandro Ballone +1
Turbulence plays a key role in star formation in molecular clouds, affecting star cluster primordial properties. As modelling present-day objects hinges on our understanding of the…
Mass and rate of hierarchical black hole mergers in young, globular and nuclear star clusters
Michela Mapelli, Filippo Santoliquido, Yann Bouffanais +3
Hierarchical mergers are one of the distinctive signatures of binary black hole (BBH) formation through dynamical evolution. Here, we present a fast semi-analytic approach to simul…
The cosmic merger rate density evolution of compact binaries formed in young star clusters and in isolated binaries
Filippo Santoliquido, Michela Mapelli, Yann Bouffanais +5
Next generation ground-based gravitational-wave detectors will observe binary black hole (BBH) mergers up to redshift , probing the evolution of compact binary (CB) m…
Binary black holes in young star clusters: the impact of metallicity
Ugo N. Di Carlo, Michela Mapelli, Nicola Giacobbo +9
Young star clusters are the most common birth-place of massive stars and are dynamically active environments. Here, we study the formation of black holes (BHs) and binary black hol…
Dynamics of black hole - neutron star binaries in young star clusters
Sara Rastello, Michela Mapelli, Ugo N. Di Carlo +5
Young star clusters are likely the most common birthplace of massive stars across cosmic time and influence the formation of compact binaries in several ways. Here, we simulate the…
Evolution of fractality and rotation in embedded star clusters
Alessandro Ballone, Michela Mapelli, Ugo N. Di Carlo +3
More and more observations indicate that young star clusters could retain imprints of their formation process. In particular, the degree of substructuring and rotation are possibly…
A common origin for the circumnuclear disc and the nearby molecular clouds in the Galactic Centre
Alessandro Ballone, Michela Mapelli, Alessandro Alberto Trani
The origin of the molecular clouds orbiting SgrA* is one of the most debated questions about our Galactic Centre. Here, we present the hydrodynamic simulation of a molecular cloud…
Weighing the IMBH candidate CO-0.40-0.22* in the Galactic Centre
Alessandro Ballone, Michela Mapelli, Mario Pasquato
The high velocity gradient observed in the compact cloud CO-0.40-0.22, at a projected distance of 60 pc from the centre of the Milky Way, has led its discoverers to identify the cl…
Forming circumnuclear disks and rings in galactic nuclei: a competition between supermassive black hole and nuclear star cluster
Alessandro A. Trani, Michela Mapelli, Alessandro Ballone
We investigate the formation of circumnuclear gas structures from the tidal disruption of molecular clouds in galactic nuclei, by means of smoothed particle hydrodynamics simulatio…
Simulating the pericentre passage of the Galactic centre star S2
M. Schartmann, A. Burkert, A. Ballone
The so-called S2 star reached its closest approach to the massive black hole (BH) at around 1500 in May 2018. It has been proposed that the interaction of its stella…
3D AMR hydrosimulations of a compact source scenario for the Galactic Centre cloud G2
A. Ballone, M. Schartmann, A. Burkert +8
The nature of the gaseous and dusty cloud G2 in the Galactic Centre is still under debate. We present three-dimensional hydrodynamical adaptive mesh refinement (AMR) simulations of…
3D AMR simulations of G2 as an outflow
A. Ballone, M. Schartmann, A. Burkert +8
We study the evolution of G2 in a \textit{Compact Source Scenario}, where G2 is the outflow from a low-mass central star moving on the observed orbit. This is done through 3D AMR s…
3D AMR simulations of the evolution of the diffuse gas cloud G2 in the Galactic Centre
M. Schartmann, A. Ballone, A. Burkert +8
With the help of 3D AMR hydrodynamical simulations we aim at understanding G2's nature, recent evolution and fate in the coming years. By exploring the possible parameter space of…
The G2+G2t complex as a fast and massive outflow?
A. Ballone, M. Schartmann, A. Burkert +8
Observations of the gas component of the cloud G2 in the Galactic Center have revealed its connection to a tail (G2t) lying on the same orbit. More recent studies indicate a connec…