The Milky Way is a unique benchmark for theoretical studies related to galaxy assembly. However, maximal science return requires tightening the currently loose constraints on dark and baryonic mass distributions, as well as robustly determining the Galaxy mass budget. In this field of research my niche is to exploit compact object related phenomena. First I will describe how my group is exploiting hypervelocity stars --ejected by close encounters with our supermassive black hole--to investigate the dark matter halo. Then, I will show how double white dwarf binaries --detected in optical and gravitational waves--can instead be used as baryonic matter tracers. In this talk, Gaia, LSST and LISA will feature prominently.
Followed by wine and cheese