3 papers
astro-ph.CO2024
Searching for large dark matter clumps using the Galileo Satnav clock variations
Bruno Bertrand, Pascale Defraigne, Aurélien Hees +8
This study presents bounds on transient variations of fundamental constants, with typical timescales ranging from minutes to months, using clocks in space. The underlying phenomeno…
astro-ph.CO2024
Probing Primordial Black Holes and Dark Matter Clumps in the Solar System with Gravimeter and GNSS Networks
Michal Cuadrat-Grzybowski, Sébastien Clesse, Pascale Defraigne +2
We show that Global Navigation Satellite Systems (GNSS) and gravimeters on Earth and in space can potentially offer the most accurate direct measurement of local density of near-Ea…
astro-ph.CO2023
Observing dark matter clumps and asteroid-mass primordial black holes in the solar system with gravimeters and GNSS networks
Bruno Bertrand, Michal Cuadrat-Grzybowski, Pascale Defraigne +2
In this proceedings, we study the possible gravitational impact of primordial black holes (PBHs) or dark matter (DM) clumps on GNSS satellite orbits and gravimeter measurements. It…