24 citations · 35 across the 7 of their papers we have counts for
7 papers
Collisional Dynamics of Stars and Dark Matter in Ultra-Faint Galaxies
Raphaël Errani, Nicolas Esser, Jorge Peñarrubia +1
We use controlled N-body simulations to study the collisional exchange of energy between stars and dark matter in ultra-faint galaxies. We find that dynamical friction between star…
Dark matter dynamical friction on binary stars in the faintest dwarf galaxies: I. Analytical approach
Nicolas Esser
We study binary stars moving through a uniform dark matter background and experiencing dynamical friction. The centre-of-mass motion of the pairs is taken into account. We derive f…
Gravitational waves from primordial black holes passing by neutron stars: observational prospects for the Galactic center
Nicolas Esser, Juan García-Bellido, Peter Tinyakov
We investigate the gravitational wave (GW) signals emitted by planetary-mass primordial black holes (PBHs) passing nearby or traversing neutron stars (NSs). While previous studies…
Primordial black hole-star binaries via dynamical friction
Nicolas Esser
We study a new channel for binary system formation involving stars and stellar-mass primordial black holes (PBHs) embedded in dark matter (DM) minihalos. In this scenario, binaries…
Constraints on asteroid-mass primordial black holes in dwarf galaxies using Hubble Space Telescope photometry
Nicolas Esser, Carrie Filion, Sven De Rijcke +4
Primordial black holes (PBHs) in the asteroid-mass range remain a viable and until now unconstrained dark matter (DM) candidate. If such PBHs exist, they could be captured by stars…
The impact of primordial black holes on the stellar mass function of ultra-faint dwarf galaxies
Nicolas Esser, Sven De Rijcke, Peter Tinyakov
If primordial black holes constitute the dark matter, stars forming in dark-matter dominated environments with low velocity dispersions, such as ultra-faint dwarf galaxies, may cap…
Constraints on primordial black holes from observation of stars in dwarf galaxies
Nicolas Esser, Peter Tinyakov
We propose a way to constrain the primordial black hole (PBH) abundance in the range of PBH masses around g based on their capture by Sun-like stars in dwarf galaxies,…