| Speaker: | Anand Raichoor (LBNL) |
|---|---|
| Title: | DESI Emission Line Galaxy (ELG) sample overview; Spectroscopic roadmap (DESI-Extension, DESI-2, Spec-S5) |
| Date (JST): | Mon, Nov 25, 2024, 13:30 - 15:00 |
| Place: | Seminar Room A |
| Abstract: |
DESI is the first Stage-IV experiment going on sky. Its Main Survey (2021-2026) will observe 40M spectra to primarly measure the BAO over z < 4. As for the SDSS/BOSS+eBOSS, DESI makes use of an optimal tracer for each redshift range: BGS at z<0.4, LRGs at 0.4<z<1.1, ELGs at 0.6<z<1.6, and QSO at z>0.8. The ELGs, which represent the bulk of DESI redshifts, will also be core tracers for other Stage IV spectroscopic experiments as PFS or Euclid. I will present an overview of the ELG sample, in particular the target selection, the spectroscopic redshift measurement, and systematics analysis. Besides, I will also present the spectroscopic roadmap of the US community for the next decade: after a possible extension of the DESI survey, the second phase of the DESI instrument, DESI-2, will explore the 2 < z < 4.5 Universe thanks to Lyman Alpha Emitters (LAE) and Lyman Break Galaxies (LBGs). DESI-2 will be a pathfinder for the next Stage V experiment, Spec-S5. Spec-S5 (2035-2045) will be a new platform dedicated to map hundreds of millions of stars and galaxies in three dimensions, with the primary goal to explore the primordial physics with 2 < z < 4.5 LAEs and LBGs. |
