On large scales in the Universe, the Cold Dark Matter paradigm, where scale-invariant density perturbations are seeded during inflation, has been spectacularly successful. On smaller scales, we expect the particle nature of dark matter to imprint unique fingerprints of its microphysical nature. We discuss how astrophysical observations on sub-galactic scales, such as pulsar timing arrays, can probe theories of dark matter and dark sectors beyond the Weakly Interacting Massive Particle (WIMP). We connect these astrophysical probes to new laboratory direct detection experiments to search for dark sectors.
The CHARA Array is a six 1-m telescope optical/infrared interferometer constructed and operated by Georgia State University and located just to our north at Mount Wilson Observatory. With the largest baselines in the world and milli-arcsecond resolution, the CHARA Array has addressed many aspects of stellar astrophysics including measuring stellar diameters, imaging the surfaces of stars, studying the morphology of AGN cores, resolving the structure of circumstellar disks, imaging targets of opportunity like Novae, and mapping the orbits of close binary companions. We will provide an overview of the Array itself, focusing on the adaptive optics systems, the addition of a seventh movable telescope, experiments with fiber-based beam transport, and the development of the next generation of beam combiners. The new instrumentation will improve sensitivity and provide six-way beam combination at a variety of wavelength regions including R, I, J, H and K bands. We will then highlight recent science results and discuss the open access time that is available to the community through the NOIRLab time allocation process.