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The MUSE-Faint survey. III. No large dark-matter cores and no significant tidal stripping in ultra-faint dwarf galaxies
Sebastiaan L. Zoutendijk, Mariana P. Júlio, Jarle Brinchmann +8
[Abridged] Aims. The lowest-mass galaxies, ultra-faint dwarf galaxies, promise unparalleled constraints on how feedback regulates galaxy formation, and on the small-scale matter po…
EDGE: What shapes the relationship between HI and stellar observables in faint dwarf galaxies?
Martin P. Rey, Andrew Pontzen, Oscar Agertz +5
We show how the interplay between feedback and mass-growth histories introduces scatter in the relationship between stellar and neutral gas properties of field faint dwarf galaxies…
EDGE: The sensitivity of ultra-faint dwarfs to a metallicity-dependent initial mass function
Mateo Prgomet, Martin P. Rey, Eric P. Andersson +5
Motivated by the observed bottom-light initial mass function (IMF) in faint dwarfs, we study how a metallicity-dependent IMF affects the feedback budget and observables of an ultra…
Constraining Ultra Light Dark Matter with the Galactic Nuclear Star Cluster
Firat Toguz, Daisuke Kawata, George Seabroke +1
We use the Milky Way's nuclear star cluster (NSC) to test the existence of a dark matter 'soliton core', as predicted in ultra-light dark matter (ULDM) models. Since the soliton co…
Andromeda XXI -- a dwarf galaxy in a low density dark matter halo
Michelle L. M. Collins, Justin I. Read, Rodrigo A. Ibata +6
Andromeda XXI (And XXI) has been proposed as a dwarf spheroidal galaxy with a central dark matter density that is lower than expected in the Standard Cold Dark Matter (CDM)…
EDGE: Two routes to dark matter core formation in ultra-faint dwarfs
Matthew D. A. Orkney, Justin I. Read, Martin P. Rey +6
In the standard Lambda cold dark matter paradigm, pure dark matter simulations predict dwarf galaxies should inhabit dark matter haloes with a centrally diverging density `cusp'. T…