Dark Matters 2022

Session

Primordial Black Holes

30 Nov 2022, 10:10

Salle Solvay (NO Buidling, 5th floor) (ULB, Campus de la Plaine)

3. Primordial black holes: formation and cosmological signatures

Ilia Musco

30/11/2022, 10:10

4. Primordial black holes: a connection between LIGO/Virgo mergers and constraints on the early universe

Gabriele Franciolini

30/11/2022, 11:20

Primordial Black Holes (PBHs) might comprise a significant fraction of dark matter in the Universe and can give rise to observable signatures in current and future gravitational wave (GW) experiments. Focusing on the formation PBHs in the mass range probed by the LIGO/Virgo/Kagra detectors, I will first discuss the main features of a population of PBH mergers, highlighting the smoking-gun...

22. Pulsar timing array search for scalar induced gravitational waves and primordial black holes

Virgile Dandoy

30/11/2022, 12:00

In this work, we consider the formation of primordial black holes from large curvature perturbations at scales unconstrained by CMB observations. In addition to black holes, those curvature perturbations would induce gravitational waves able to explain the possible signal observed in the last NANOGrav 12.5-years data set and the second IPTA data release. We use here a log-normal profile for...

6. Constraints on primordial black holes from observation of stars in dwarf galaxies

Nicolas Esser

30/11/2022, 12:15

We propose a way to constrain the primordial black hole (PBH) abundance in the range of PBH masses around 10^20g based on their capture by Sun-like stars in dwarf galaxies, with subsequent star destruction. We calculate numerically the probability of a PBH capture by a star at the time of its formation in an environment typical of dwarf galaxies. Requiring that no more than a fraction of stars...