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Fuzzy dark matter dynamics in tidally perturbed dwarf spheroidal galaxy satellites
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). University of Copenhagen, Denmark.ORCID iD: 0000-0001-5686-3743
Number of Authors: 32024 (English)In: Journal of Cosmology and Astroparticle Physics, E-ISSN 1475-7516, no 3, article id 052Article in journal (Refereed) Published
Abstract [en]

Fuzzy dark matter (FDM) has dynamical properties that differ significantly from cold dark matter (CDM). These dynamical differences are strongly manifested on the spatial scale of dwarf spheroidal galaxies (dSphs), which roughly corresponds to the de Broglie wavelength of a canonical mass FDM particle. We study simulations of a dSph satellite which is tidally perturbed by its host galaxy, in order to identify dynamical signatures that are unique to FDM, and to quantify the imprints of such perturbations on an observable stellar tracer population. We find that a perturbed FDM soliton develops a long-standing breathing mode, whereas for CDM such a breathing mode quickly phase-mixes and disappears. We also demonstrate that such signatures become imprinted on the dynamics of a stellar tracer population, making them observable with sufficiently precise astrometric measurements.

Place, publisher, year, edition, pages
2024. no 3, article id 052
Keywords [en]
Fourier transforms, dark matter simulations, galaxy dynamics
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-228638DOI: 10.1088/1475-7516/2024/03/052ISI: 001195863300007Scopus ID: 2-s2.0-85188912235OAI: oai:DiVA.org:su-228638DiVA, id: diva2:1856582
Available from: 2024-05-07 Created: 2024-05-07 Last updated: 2024-05-07Bibliographically approved

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Widmark, Axel

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