19 papers
On an empirical method to build near-equilibrium axisymmetric and triaxial galaxy models
Pierfrancesco Di Cintio, Alessandro Alberto Trani, Valentina Cesare
We introduce a numerical technique to implement body realizations of axisymmetric and triaxial self-gravitating system starting from a spherical self-consistent models for whic…
Beyond the Largest Lyapunov Exponent: Entropy-Based Diagnostics of Chaos in Henon-Heiles and N-Body Dynamics
Alessandro Alberto Trani, Pierfrancesco Di Cintio, Michele Ginolfi
The largest Lyapunov exponent is widely used to diagnose chaos in gravitational dynamics, but in mixed phase spaces and finite-N systems it does not always provide a complete descr…
AGN-driven BBH mergers: Black hole populations and hierarchical growth across the AGN parameter space
Maria Paola Vaccaro, Michela Mapelli, Alessandro Alberto Trani +1
Active galactic nuclei (AGNs) have been proposed as efficient environments for the formation of binary black holes (BBHs). We present an updated semi-analytical framework for BBH f…
The impact of envelope binding energies on the merger rate density of binary compact objects
Cecilia Sgalletta, Guglielmo Costa, Giuliano Iorio +8
The common envelope (CE) phase plays a key role in the formation of binary compact object systems. Its final outcome strongly depends on the envelope binding energy, but this quant…
A benchmark for binary star interaction with a supermassive black hole in general relativity
Megha Sharma, Alexander Heger, Daniel J. Price +4
Most galaxies have supermassive black holes (SMBH) at their centres, surrounded by stars with binary systems also present in this environment. We use two schemes - post-Newtonian (…
The long-term evolution of Ultra Faint Dwarf Galaxies and observational implications
Francesco Flammini Dotti, Roberto Capuzzo-Dolcetta, Giovanni Carraro +2
Context. In the Local Group, dwarf spheroidal galaxies (dSphs) and ultra-faint dwarf galaxies (UFDs) exhibit large velocity dispersions. These values are generally attributed to th…