Sizes of Lensed Lower-luminosity z=4-8 Galaxies from the Hubble Frontier Field Program
| Autor: | R. J. Bouwens, G. D. Illingworth, P. G. van Dokkum, P. A. Oesch, M. Stefanon, B. Ribeiro |
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| Rok vydání: | 2021 |
| Předmět: |
MASS RELATION
EPOCH FORMATION SIMULATION Astrophysics - astrophysics of galaxies Astrophysics::High Energy Astrophysical Phenomena Gravitational lensing FOS: Physical sciences SURFACE BRIGHTNESS Astronomy and Astrophysics DARK-AGES REIONIZATION Astrophysics::Cosmology and Extragalactic Astrophysics EVOLUTION STAR-FORMATION Space and Planetary Science FAINT-END GLOBULAR-CLUSTERS Astrophysics of Galaxies (astro-ph.GA) Astrophysics::Solar and Stellar Astrophysics High Energy Physics::Experiment STRONG-LENSING ANALYSIS Dwarf galaxies Astrophysics::Galaxy Astrophysics |
| Zdroj: | Bouwens, R J, Illingworth, G D, van Dokkum, P G, Oesch, P A, Stefanon, M & Ribeiro, B 2022, ' Sizes of Lensed Lower-luminosity z=4-8 Galaxies from the Hubble Frontier Field Program ', Astrophysical Journal, vol. 927, no. 1, 81 . https://doi.org/10.3847/1538-4357/ac4791 The Astrophysical Journal, 927(1):81 |
| DOI: | 10.48550/arxiv.2112.02948 |
| Popis: | We constrain the rest-UV size-luminosity relation for star-forming galaxies at z~4 and z~6, 7, and 8 identified behind clusters from the Hubble Frontier Fields (HFF) program. The size-luminosity relation is key to deriving accurate luminosity functions (LF) for faint galaxies. Making use of the latest lensing models and full data set for these clusters, lensing-corrected sizes and luminosities are derived for 68 z~4, 184 z~6, 93 z~7, and 53 z~8 galaxies. We show that size measurements can be reliably measured up to linear magnifications of 30x, where the lensing models are well calibrated. The sizes we measure span a >1-dex range, from ~500 pc. Uncertainties are based on both the formal fit errors and systematic differences between the public lensing models. These uncertainties range from ~20 pc for the smallest sources to 50 pc for the largest. Using a forward-modeling procedure to model the impact of incompleteness and magnification uncertainties, we characterize the size-luminosity relation at both z~4 and z~6-8. We find that the source sizes of star-forming galaxies at z~4 and z~6-8 scale with luminosity L as L^{0.54\pm0.08} and L^{0.40+/-0.04}, respectively, such that lower luminosity (>~-18 mag) galaxies are smaller than expected from extrapolating the size-luminosity relation at high luminosities ( Comment: 22 pages, 18 figures, 2 tables, accepted for publication into ApJ. arXiv admin note: substantial text overlap with arXiv:1711.02090 |
| Databáze: | OpenAIRE |
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