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An Effective Model for the Tidal Disruption of Satellites Undergoing Minor Mergers with Axisymmetric Primaries by Varisco, Ludovica; Dotti, Massimo; Bonetti, Matteo; Bortolas, Elisa; Lupi, Alessandro is a scholarly article available to read on EtoBox.

What is An Effective Model for the Tidal Disruption of Satellites Undergoing Minor Mergers with Axisymmetric Primaries about?

According to the hierarchical formation paradigm, galaxies form through mergers of smaller entities and massive black holes (MBHs), if lurking at their centers, migrate to the nucleus of the newly formed galaxy, where they form binary systems. The formation and evolution of MBH binaries, and in particular their coalescence timescale, is very relevant for current and future facilities aimed at detecting the gravitational-wave signal produced by the MBH close to coalescence. While most of the studies targeting this process are based on hydrodynamic simulations, the high computational cost makes a complete parameter space exploration prohibitive. Semi-analytic approaches represent a valid alternative, but they require ad-hoc prescriptions for the mass loss of the merging galaxies in minor mergers due to tidal stripping, which is not commonly considered or at most modelled assuming very idealised geometries. In this work, we propose a novel, effective model for the tidal stripping in axisymmetric potentials, to be implemented in semi-analytic models. We validate our semi-analytic approach against N-body simulations considering different galaxy sizes, inclinations, and eccentricities, f

Author

Varisco, Ludovica; Dotti, Massimo; Bonetti, Matteo; Bortolas, Elisa; Lupi, Alessandro

Published

2024

Language

EN