activity
20022026
most citedGalactic secondary positron flux at the Earth

201 citations · 1.9k across the 52 of their papers we have counts for

collaborators

54 papers

astro-ph.CO2026

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…

astro-ph.CO2026

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…

astro-ph.HE2025

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…

astro-ph.GA2024

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…

astro-ph.CO2022★ 2 cited

Analytical insight into dark matter subhalo boost factors for Sommerfeld-enhanced - and -wave -ray signals

Gaétan Facchinetti, Martin Stref, Thomas Lacroix +4

As searches for thermal and self-annihilating dark matter (DM) intensify, it becomes crucial to include as many relevant physical processes and ingredients as possible to refine si…

astro-ph.HE2022★ 8 cited

Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation

Thomas Lacroix, Gaétan Facchinetti, Judit Pérez-Romero +4

Gamma-ray observations have long been used to constrain the properties of dark matter (DM), with a strong focus on weakly interacting massive particles annihilating through velocit…