Program: GN-2023A-Q-118

IC 2574 is an intriguing dwarf irregular galaxy with a surprisingly dark matter deficient (DMD) centre. It is isolated, gas rich and has an unusual, rich globular cluster (GC) population. This makes IC 2574 an ideal testing laboratory for distinguishing DMD models as this galaxy is unlikely to have been affected by tidal forces in a significant way. With this proposal we will obtain multi-object spectra of 21 GC candidates across two pointings. We will measure the radial velocities for these GCs and make an independent measurement of the central mass of IC 2574 to test whether IC 2574 is truly DMD in its centre. Additionally, we will study the rich GC population in exquisite detail by measuring precision metallicities for 50% of our sample, and for the brightest objects, their alpha abundances. With just 8.07 hours of Gemini GMOS-N time, we can probe a growing challenge to LCDM with an ideal galaxy and confirm and study its rich GC population in detail, allowing us to understand IC 2574 and study how GC systems form in low mass galaxies.