Bibliographic Details
| Title: |
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic Star Formation Rate Density 300 Myr after the Big Bang |
| Authors: |
Brant Robertson, Benjamin D. Johnson, Sandro Tacchella, Daniel J. Eisenstein, Kevin Hainline, Santiago Arribas, William M. Baker, Andrew J. Bunker, Stefano Carniani, Phillip A. Cargile, Courtney Carreira, Stephane Charlot, Jacopo Chevallard, Mirko Curti, Emma Curtis-Lake, Francesco D’Eugenio, Eiichi Egami, Ryan Hausen, Jakob M. Helton, Peter Jakobsen, Zhiyuan Ji, Gareth C. Jones, Roberto Maiolino, Michael V. Maseda, Erica Nelson, Pablo G. Pérez-González, Dávid Puskás, Marcia Rieke, Renske Smit, Fengwu Sun, Hannah Übler, Lily Whitler, Christina C. Williams, Christopher N. A. Willmer, Chris Willott, Joris Witstok |
| Source: |
The Astrophysical Journal, Vol 970, Iss 1, p 31 (2024) |
| Publisher Information: |
IOP Publishing, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Astrophysics |
| Subject Terms: |
Early universe, Galaxy formation, Galaxy evolution, High-redshift galaxies, Reionization, Astrophysics, QB460-466 |
| More Details: |
We characterize the earliest galaxy population in the JADES Origins Field, the deepest imaging field observed with JWST. We make use of ancillary Hubble Space Telescope optical images (five filters spanning 0.4–0.9 μ m) and novel JWST images with 14 filters spanning 0.8−5 μ m, including seven medium-band filters, and reaching total exposure times of up to 46 hr per filter. We combine all our data at >2.3 μ m to construct an ultradeep image, reaching as deep as ≈31.4 AB mag in the stack and 30.3–31.0 AB mag (5 σ , r = 0.″1 circular aperture) in individual filters. We measure photometric redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts z = 11.5−15. These objects show compact half-light radii of R _1/2 ∼ 50−200 pc, stellar masses of M _⋆ ∼ 10 ^7 −10 ^8 M _☉ , and star formation rates ∼ 0.1−1 M _☉ yr ^−1 . Our search finds no candidates at 15 < z < 20, placing upper limits at these redshifts. We develop a forward-modeling approach to infer the properties of the evolving luminosity function without binning in redshift or luminosity that marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the impact of nondetections. We find a z = 12 luminosity function in good agreement with prior results, and that the luminosity function normalization and UV luminosity density decline by a factor of ∼2.5 from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical models for evolution of the dark matter halo mass function. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1538-4357 |
| Relation: |
https://doaj.org/toc/1538-4357 |
| DOI: |
10.3847/1538-4357/ad463d |
| Access URL: |
https://doaj.org/article/b50b5903eb284ed180820181fa7cc563 |
| Accession Number: |
edsdoj.b50b5903eb284ed180820181fa7cc563 |
| Database: |
Directory of Open Access Journals |
