LISA double white dwarf binaries as Galactic accelerometers

Galactic double white dwarf (DWD) binaries are key sources for the upcoming Laser Interferometer Space Antenna (LISA), a space-based gravitational wave (GW) detector. Most DWDs within the LISA frequency range are not near merging and emit nearly monochromatic GWs. As these sources are scattered across the Milky Way, they experience varying accelerations in the Galactic gravitational potential, resulting in distinct apparent GW frequency chirps due to the differential acceleration between each DWD and LISA. In this presentation, we explore how Galactic acceleration affects parameter estimation for these sources and discuss how LISA observations could provide insight into the distribution of matter in the Galaxy.