158 citations · 1.5k across the 32 of their papers we have counts for
24 papers · 1 filter
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…
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…
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…
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…
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…
Stellar feedback efficiencies: supernovae versus stellar winds
Katharina M. Fierlinger, Andreas Burkert, Evangelia Ntormousi +5
Stellar winds and supernova (SN) explosions of massive stars ("stellar feedback") create bubbles in the interstellar medium (ISM) and insert newly produced heavy elements and kinet…
3D adaptive mesh refinement simulations of the gas cloud G2 born within the disks of young stars in the Galactic Center
M. Schartmann, A. Ballone, A. Burkert +8
The dusty, ionized gas cloud G2 is currently passing the massive black hole in the Galactic Center at a distance of roughly 2400 Schwarzschild radii. We explore the possibility of…
Clump formation through colliding stellar winds in the Galactic Centre
D. Calderón, A. Ballone, J. Cuadra +3
The gas cloud G2 is currently being tidally disrupted by the Galactic Centre super-massive black hole, Sgr A*. The region around the black hole is populated by Wolf-Rayet…
The Galactic Center cloud G2 and its gas streamer
Oliver Pfuhl, Stefan Gillessen, Frank Eisenhauer +10
We present new, deep near-infrared SINFONI @ VLT integral field spectroscopy of the gas cloud G2 in the Galactic Center, from late summer 2013 and spring 2014. G2 is visible in rec…
Hydrodynamical simulations of a compact source scenario for G2
A. Ballone, M. Schartmann, A. Burkert +6
The origin of the dense gas cloud G2 discovered in the Galactic Center (Gillessen et al. 2012) is still a debated puzzle. G2 might be a diffuse cloud or the result of an outflow fr…
Pericenter passage of the gas cloud G2 in the Galactic Center
Stefan Gillessen, Reinhard Genzel, Tobias K Fritz +6
We have further followed the evolution of the orbital and physical properties of G2, the object currently falling toward the massive black hole in the Galactic Center on a near-rad…
Hydrodynamical simulations of a compact source scenario for the Galactic Center cloud G2
A. Ballone, M. Schartmann, A. Burkert +6
The origin of the dense gas cloud G2 discovered in the Galactic Center (Gillessen et al. 2012) is still a debated puzzle. G2 might be a diffuse cloud or the result of an outflow fr…
Simulations of the Origin and Fate of the Galactic Center Cloud G2
M. Schartmann, A. Burkert, Ch. Alig +4
We investigate the origin and fate of the recently discovered gas cloud G2 close to the Galactic Center. Our hydrodynamical simulations focussing on the dynamical evolution of the…