6 papers
Perturber-Driven Dynamics of Supermassive Black Hole Binaries in Galaxy Merger
Julian Chan, Alessia Gualandris, Walter Dehnen +1
The paper uses high‑resolution N‑body simulations of a major galaxy merger to test how massive perturbers in the host galaxy affect the eccentricity scatter of supermassive black h…
Dark Matter in Draco and Boötes I: Hints of a Core in an Ultra-Faint Dwarf from Simulation-Based Inference
Tri Nguyen, Lina Necib, Ting S. Li +8
The density profiles of dwarf spheroidal galaxies are among the most sensitive probes of dark matter physics, yet extracting them from noisy stellar kinematics remains a fundamenta…
VINTERGATAN-GM: long-lived satellite planes induced by a massive GSE-like merger
R. RodrÃguez-Cardoso, S. Roca-FÃ brega, Oscar Agertz +7
Satellite galaxies in the Local Group tend to be distributed in thin, planar configurations, with many sharing coherent orbital motion. Galaxy formation simulations in CDM have…
Converging on the eccentricity of massive black hole binaries in galactic mergers
Alessia Gualandris, Justin Read, Federica Fastidio +4
Binaries of supermassive black holes (MBHBs) represent the primary sources of the gravitational wave background (GWB) detectable by Pulsar Timing Arrays (PTAs). The eccentricity wi…
Black hole dragging: a new mechanism for forming nuclear star clusters in giant elliptical galaxies
Nader Khonji, Alessia Gualandris, Justin I. Read +1
It has long been thought that nuclear star clusters (NSCs) cannot co-exist with the most massive supermassive black holes (SMBHs), since SMBH mergers - unavoidable for the most mas…
Realistic consecutive galaxy mergers form eccentric PTA sources
Federica Fastidio, Elisa Bortolas, Alessia Gualandris +3
Results from pulsar timing arrays (PTAs) show evidence of a gravitational wave background (GWB) consistent with a population of unresolved supermassive black hole binaries (BHBs).…