| Speaker: | Tim Eifler (University of Arizona) |
|---|---|
| Title: | Cosmology with the Roman Space Telescope |
| Date (JST): | Thu, May 25, 2023, 11:00 - 12:00 |
| Place: | Hybrid |
| Abstract: |
The Nancy Grace Roman Space Telescope (launch 2026) is a multi-purpose space observatory, with a 100 times larger field-of-view than the Hubble Space Telescope. It 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, a 0.28 deg$^2$ field of view with a 0.11 arcsec pixel scale, and 400-800 resolution grism spectroscopy. The so-called “reference survey design” of the HLS assumes a 2,000 deg^2 area observed with the 4 NIR bands and the grism spectroscopy, however the actual survey strategy of Roman will be decided by the community and will only be finalized shortly before launch. In this talk I will show possible survey strategies for the HLS survey that are different from the reference survey and I will explain advantages and disadvantages for constraining cosmology in general and dark energy in particular. I will discuss the different cosmological probes that can be extracted from the Roman dataset, potential systematics and their mitigation strategies, and synergies with external datasets such as Rubin Observatory’s Legacy Survey of Space and Time (LSST) and CMB-S4. If time |
| Remarks: | Seminar room A & Zoom |
