000006999 001__ 6999
000006999 005__ 20240729144101.0
000006999 0247_ $$2DOI$$a10.1016/j.asr.2024.03.080
000006999 037__ $$aSCART-2024-0152
000006999 088__ $$ae-Print: 2403.17890 [astro-ph.CO]
000006999 100__ $$aBertrand, Bruno 
000006999 245__ $$aSearching for large dark matter clumps using the Galileo Constellation clock variations
000006999 260__ $$c2014
000006999 520__ $$aThis study presents bounds on transient variations of fundamental constants, with typical timescales ranging from minutes to months, using clocks in space. The underlying phenomenology describing such transient variations relies on models for Dark Matter (DM) which suggest possible encounters of macroscopic compact objects with the Earth, due to the motion of the solar system in the galactic halo. If such compact objects possess an effective feeble interaction with the ordinary matter beyond the gravitational one, it may result in effective transient variations of fundamental constants. Such variations leave signatures on clocks onboard GNSS satellites. In this paper, we introduce a phenomenological study dedicated to the search for such DM transient objects using the network of passive hydrogen masers (H-Masers) onboard Galileo satellites. We first model the signature of transient variations of fundamental constants as a frequency modulation in the difference between two satellite clocks, considering the satellite trajectories relative to the transient event. Then, we present first results based on a fast analysis method, the maximum reach analysis. The main result is a significant extension of the discovery range for DM transients, with a sensitivity never achieved before. We investigate indeed the range of transient sizes from to kilometres, which, apart from indirect and model-dependent non-transient effects, has never been explored previously.
000006999 536__ $$aH2020-ESA-038 /$$c GASTON/$$f GASTON
000006999 594__ $$aNO
000006999 6531_ $$aTests of fundamental physics
000006999 6531_ $$aDark matter
000006999 6531_ $$aGNSS
000006999 6531_ $$aClocks in space
000006999 6531_ $$aVariation of fundamental constants
000006999 700__ $$aDefraigne, Pascale
000006999 700__ $$aHees, Aurélien
000006999 700__ $$aSheremet, Alexandra
000006999 700__ $$aCourde, Clément
000006999 700__ $$aChabé, Julien
000006999 700__ $$aVentura-Traveset, Javier 
000006999 700__ $$aDilssner, Florian,
000006999 700__ $$aSchoenemann, Erik
000006999 700__ $$aMendes, Luis 
000006999 700__ $$aDelva, Pacôme 
000006999 773__ $$c2551-2563$$n6$$pAdvances in Space Research$$v74$$y2014
000006999 8560_ $$fbruno.bertrand@ksb-orb.be
000006999 85642 $$ahttps://www.sciencedirect.com/science/article/pii/S0273117724003302
000006999 905__ $$apublished in
000006999 980__ $$aREFERD