Physics of the Cosmos
Exploring fundamental questions regarding the physical forces of the universe

Cosmic Structure Science Interest Group
(CoS SIG)

Events: Meetings

Cosmic Structures Science Interest Group Webinar

Monday, 16 December 2024, 12:00 Noon ET
Kinematic Lensing with the Roman Space Telescope
Professor Tim Eifler, University of Arizona

Abstract: 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.


Webinar Video

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