Astraeus - II
| Autor: | Stefan Gottlöber, Graziano Ucci, Marco Castellano, Gustavo Yepes, Pratika Dayal, Anne Hutter, Laura Pentericci, Tirthankar Roy Choudhury, Laurent Legrand |
|---|---|
| Přispěvatelé: | Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
stars: luminosity function
media_common.quotation_subject Astrophysics::High Energy Astrophysical Phenomena Dark matter FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences galaxies: high-redshift 0103 physical sciences Galaxy formation and evolution galaxies: formation dark ages 010303 astronomy & astrophysics Reionization Astrophysics::Galaxy Astrophysics Luminosity function (astronomy) media_common Physics 010308 nuclear & particles physics first star Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Cosmic variance Astrophysics - Astrophysics of Galaxies Galaxy Universe Redshift 13. Climate action Space and Planetary Science mass function Astrophysics of Galaxies (astro-ph.GA) reionization galaxies: evolution |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 506, 202-214. Oxford University Press Monthly Notices of the Royal Astronomical Society |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | Next generation telescopes such as the James Webb Space Telescope (JWST) and the Nancy Grace Roman Space Telescope (NGRST) will enable us to study the first billion years of our Universe in unprecedented detail. In this work we use the ASTRAEUS (semi-numerical rAdiative tranSfer coupling of galaxy formaTion and Reionization in N-body dArk mattEr simUlationS) framework, that couples galaxy formation and reionization (for a wide range of reionization feedback models), to estimate the cosmic variance expected in the UV Luminosity Function (UV LF) and the Stellar Mass Function (SMF) in JWST surveys. We find that different reionization scenarios play a minor role in the cosmic variance. Most of the cosmic variance is completely driven by the underlying density field and increases above $100\%$ for ${\rm M}_{\rm UV} \sim -17.5 (-20)$ at $z =12 (6)$ for the JADES-deep survey (the deep JWST Advanced Extragalactic Survey with an area of 46 arcmin$^2$); the cosmic variance decreases with an increasing survey area roughly independently of redshift. We find that the faint-end (${\rm M}_{\rm UV} > -17$) slope of the Lyman Break Galaxies (LBGs) UV LF becomes increasingly shallower with increasing reionization feedback and show how JWST observations will be able to distinguish between different models of reionization feedback at $z>9$, even accounting for cosmic variance. We also show the environments (in terms of density and ionization fields)of Lyman Break Galaxies during the EoR, finding that the underlying over-density and ionization fraction scale positively with the UV luminosity. Finally, we also provide a public software tool to allow interested readers to compute cosmic variance for different redshifts and survey areas. 16 pages, 13 figures. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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