Speaker
William Cerny
Description
We overview efforts to search for undiscovered satellites of the Milky Way in photometric data from the DECam Local Volume Exploration survey (DELVE), and present our recent discovery of a candidate ultra-faint Milky Way satellite, Eridanus IV. Eridanus IV is a faint, extended, and elliptical system with a stellar population that is well-described by an old, metal-poor isochrone. These properties are consistent with the known population of ultra-faint Milky Way satellite galaxies. Eridanus IV is also prominently detected using proper motion measurements from Gaia Early Data Release 3. We highlight a range of interesting avenues for future study of this system with deeper photometric and spectroscopic data.