The Probabilistic Value-Added Catalog for the DESI Bright Galaxy Survey
Abstract
Over the next five years, the Bright Galaxy Survey (BGS) of the Dark Energy Spectroscopic Instrument (DESI) will measure the spectra of 10 million galaxies out to z~0.5. The PRObabilistic Value-Added BGS (PROVABGS) will provide posteriors on the physical properties (e.g. M*, SFR, metallicity) for each of these galaxies and produce the most statistically powerful magnitude-limited sample for galaxy studies. In this talk, I will present the target selection and design of the DESI BGS. I will also present the methods used to construct the PROVABGS, such as neural network emulators for stellar population synthesis, which enables tractable sampling of 10 million posteriors. Lastly, I will discuss the potential of PROVABGS to advance galaxy science.
- Publication:
-
Extragalactic Spectroscopic Surveys: Past, Present and Future of Galaxy Evolution (GALSPEC2021)
- Pub Date:
- April 2021
- DOI:
- 10.5281/zenodo.4721695
- Bibcode:
- 2021essp.confE..50H
- Keywords:
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- Zenodo community galspec2021