4 papers
Probing the fate of large primordial perturbations with exoplanets
Théo Paré, Julien Lavalle
We propose ultra-wide-orbit exoplanets as a novel probe of small-scale dark matter objects. These systems are highly sensitive to gravitational perturbations that could be induced…
In-depth analysis of the clustering of dark matter particles around primordial black holes. Part II. Analytical prescriptions for spikes
Julien Lavalle, Pierre Salati
Primordial black holes (PBHs) are very appealing dark matter (DM) candidates. It is highly plausible though, should they exist, that they would not make up all of the DM. Several s…
In-depth analysis of the clustering of dark matter particles around primordial black holes. Part III: CMB constraints
Julien Lavalle, Vivian Poulin, Pierre Salati
In a mixed dark matter scenario in which primordial black holes (PBHs) would co-exist with thermally produced self-annihilating particles, one expects the former to be surrounded b…
Measures of luminous and dark matter in galaxies across time
Jonathan Freundlich, Gauri Sharma, Sabine Thater +14
Dark matter is one of the pillars of the current standard model of structure formation: it is assumed to constitute most of the matter in the Universe. However, it can so far only…