TY - JOUR
T1 - Searching for Emission Lines at z > 11: The Role of Damped Ly α and Hints About the Escape of Ionizing Photons
AU - Hainline, Kevin N.
AU - D’Eugenio, Francesco
AU - Jakobsen, Peter
AU - Chevallard, Jacopo
AU - Carniani, Stefano
AU - Witstok, Joris
AU - Ji, Zhiyuan
AU - Curtis-Lake, Emma
AU - Johnson, Benjamin D.
AU - Robertson, Brant
AU - Tacchella, Sandro
AU - Curti, Mirko
AU - Charlot, Stephane
AU - Helton, Jakob M.
AU - Arribas, Santiago
AU - Bhatawdekar, Rachana
AU - Bunker, Andrew J.
AU - Cameron, Alex J.
AU - Egami, Eiichi
AU - Eisenstein, Daniel J.
AU - Hausen, Ryan
AU - Kumari, Nimisha
AU - Maiolino, Roberto
AU - Pérez-González, Pablo G.
AU - Rieke, Marcia
AU - Saxena, Aayush
AU - Scholtz, Jan
AU - Smit, Renske
AU - Sun, Fengwu
AU - Williams, Christina C.
AU - Willmer, Christopher N. A.
AU - Willott, Chris
N1 - © 2024 The Author(s). .Published by the American Astronomical Society. This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/
PY - 2024/12/1
Y1 - 2024/12/1
N2 - We describe new ultradeep James Webb Space Telescope (JWST) NIRSpec PRISM and grating spectra for the galaxies JADES-GS-z11-0 ( zspec=11.122−0.003+0.005 ) and JADES-GS-z13-0 ( zspec=13.20−0.04+0.03 ), the most distant spectroscopically confirmed galaxy discovered in the first year of JWST observations. The extraordinary depth of these observations (75 hr and 56 hr, respectively) provides a unique opportunity to explore the redshifts, stellar properties, UV magnitudes, and slopes for these two sources. For JADES-GS-z11-0, we find evidence for multiple emission lines, including [O ii]λ λ3726, 3729 and [Ne iii]λ3869, resulting in a spectroscopic redshift we determine with 94% confidence. We present stringent upper limits on the emission-line fluxes and line equivalent widths for JADES-GS-z13-0. At this spectroscopic redshift, the Lyα break in JADES-GS-z11-0 can be fit with a damped Lyα absorber with log(NHI/cm−2)=22.42−0.120+0.093 . These results demonstrate how neutral hydrogen fraction and Lyman-damping wings may impact the recovery of spectroscopic redshifts for sources like these, providing insight into the overprediction of the photometric redshifts seen for distant galaxies observed with JWST. In addition, we analyze updated NIRCam photometry to calculate the morphological properties of these resolved sources, and find a secondary source 0.″3 south of JADES-GS-z11-0 at a similar photometric redshift, hinting at how galaxies grow through interactions in the early Universe.
AB - We describe new ultradeep James Webb Space Telescope (JWST) NIRSpec PRISM and grating spectra for the galaxies JADES-GS-z11-0 ( zspec=11.122−0.003+0.005 ) and JADES-GS-z13-0 ( zspec=13.20−0.04+0.03 ), the most distant spectroscopically confirmed galaxy discovered in the first year of JWST observations. The extraordinary depth of these observations (75 hr and 56 hr, respectively) provides a unique opportunity to explore the redshifts, stellar properties, UV magnitudes, and slopes for these two sources. For JADES-GS-z11-0, we find evidence for multiple emission lines, including [O ii]λ λ3726, 3729 and [Ne iii]λ3869, resulting in a spectroscopic redshift we determine with 94% confidence. We present stringent upper limits on the emission-line fluxes and line equivalent widths for JADES-GS-z13-0. At this spectroscopic redshift, the Lyα break in JADES-GS-z11-0 can be fit with a damped Lyα absorber with log(NHI/cm−2)=22.42−0.120+0.093 . These results demonstrate how neutral hydrogen fraction and Lyman-damping wings may impact the recovery of spectroscopic redshifts for sources like these, providing insight into the overprediction of the photometric redshifts seen for distant galaxies observed with JWST. In addition, we analyze updated NIRCam photometry to calculate the morphological properties of these resolved sources, and find a secondary source 0.″3 south of JADES-GS-z11-0 at a similar photometric redshift, hinting at how galaxies grow through interactions in the early Universe.
KW - Galaxy evolution
KW - Galaxy abundances
KW - High-redshift galaxies
U2 - 10.3847/1538-4357/ad8447
DO - 10.3847/1538-4357/ad8447
M3 - Article
SN - 0004-637X
VL - 976
SP - 1
EP - 27
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 2
M1 - 160
ER -