Kinematic Lensing with the Roman Space Telescope

The Nancy Grace Roman Space will address science cases ranging from exoplanets to galaxy evolution to fundamental physics. The High Latitude Survey (HLS) component is designed to constrain dark energy evolution and deviations from General Relativity with excellent control of systematics via space-quality imaging, photometry across 4 near-infrared (NIR) bands, and 400-800 resolution grism spectroscopy. In this talk I will discuss a novel cosmological probe, so-called Kinematic Lensing (KL), that can be extracted from the joint imaging and spectroscopic dataset of Roman. A Roman-KL survey has the potential to reduce the largest noise contribution in traditional Weak Lensing (WL) by more than an order of magnitude. Further, it is immune to the most worrisome systematics that haunt WL, most prominently shear calibration and photo-z uncertainties and galaxy intrinsic alignment. I will detail the basics of the KL method and corresponding cosmological forecasts, and discuss remaining obstacles and next steps in the Roman-KL endeavor. 

Speaker: ​Tim Eiffel (University of Arizona)

The Roman Lecture Series is a monthly virtual lecture series focused on the scientific capabilities and technology of the Nancy Grace Roman Space Telescope, organized by Roman mission partners.