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20242026
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astro-ph.GA2026

Pebbles to Gems: Intermediate-mass black holes in the first star clusters

Benedetta Mestichelli, Manuel Arca Sedda, Marta Volonteri +9

The rapid assembly of supermassive black holes (SMBHs) observed at requires efficient seeding mechanisms in the early Universe. Population III (Pop. III) star clusters…

astro-ph.GA2026

Isolated or Dynamical? Tracing Black Hole Binary Formation through the Population of Gravitational-Wave Sources

Manuel Arca Sedda, Lavinia Paiella, Cristiano Ugolini +5

The population of binary black hole (BBH) mergers observed by the LIGO-Virgo-KAGRA (LVK) collaboration offers a window into the cosmic evolution of compact binaries and their forma…

astro-ph.GA2026

Teen TITANS simulations -- I. Inefficient intermediate-mass black hole seeding via stellar collisions in young massive clusters

Benedetta Mestichelli, Sara Rastello, Michela Mapelli +2

Young massive clusters (YMCs) provide favorable environments for frequent stellar collisions, potentially leading to the formation of very massive stars (VMSs) and seeds of interme…

astro-ph.GA2025

Black Hole - Neutron Star and Binary Neutron Star Mergers from Population III and II stars

Benedetta Mestichelli, Michela Mapelli, Filippo Santoliquido +9

Population III (Pop.III) stars are expected to be massive and to undergo minimal mass loss due to their lack of metals, making them ideal progenitors of black holes and neutron…

astro-ph.GA2025

Seeds to success: growing heavy black holes in dense star clusters

Lavinia Paiella, Manuel Arca Sedda, Benedetta Mestichelli +1

The observational dearth of black holes (BHs) with masses between 100 and 100,000 raises questions about the nature of intermediate-mass black holes (IMBHs). Propos…

astro-ph.GA2024

The boring history of Gaia BH3 from isolated binary evolution

Giuliano Iorio, Stefano Torniamenti, Michela Mapelli +15

Gaia BH3 is the first observed dormant black hole (BH) with a mass of M and represents the first confirmation that such massive BHs are associated with metal-…