학술논문
A Census from JWST of Extreme Emission Line Galaxies Spanning the Epoch of Reionization in CEERS
Document Type
Working Paper
Author
Davis, Kelcey; Trump, Jonathan R.; Simons, Raymond C.; Mcgrath, Elizabeth J.; Wilkins, Stephen M.; Haro, Pablo Arrabal; Bagley, Micaela B.; Dickinson, Mark; FernÁndez, Vital; AmorÍn, Ricardo O.; Backhaus, Bren E.; Cleri, Nikko J.; Llerena, Mario; Brunker, Samantha W.; Barro, Guillermo; Bisigello, Laura; Brooks, Madisyn; Costantin, Luca; De La Vega, Alexander; Dekel, Avishai; Finkelstein, Steven L.; Hathi, Nimish P.; Hirschmann, Michaela; Kartaltepe, Jeyhan S.; Koekemoer, Anton M.; Lucas, Ray A.; Papovich, Casey; PÉrez-GonzÁlez, Pablo G.; Pirzkal, Nor; Rodighiero, Giulia; Rose, Caitlin; Yung, L. Y. Aaron
Source
Subject
Language
Abstract
We present a sample of 1165 extreme emission-line galaxies (EELGs) at 45000 AA. JWST/NIRSpec spectroscopic observations of a subset (34) of the photometrically selected EELGs validate our selection method: all spectroscopically observed EELGs confirm our photometric identification of extreme emission, including some cases where the SED-derived photometric redshifts are incorrect. We find that the medium-band F410M filter in CEERS is particularly efficient at identifying EELGs, both in terms of including emission lines in the filter and in correctly identifying the continuum between Hb + [OIII] and Ha in the neighboring broad-band filters. We present examples of EELGs that could be incorrectly classified at ultra-high redshift (z>12) as a result of extreme Hb + [OIII] emission blended across the reddest photometric filters. We compare the EELGs to the broader (sub-extreme) galaxy population in the same redshift range and find that they are consistent with being the bluer, high equivalent width tail of a broader population of emission-line galaxies. The highest-EW EELGs tend to have more compact emission-line sizes than continuum sizes, suggesting that active galactic nuclei are responsible for at least some of the most extreme EELGs. Photometrically inferred emission-line ratios are consistent with ISM conditions with high ionization and moderately low metallicity, consistent with previous spectroscopic studies.
Comment: 24 pages, 25 figures, submitted to ApJ
Comment: 24 pages, 25 figures, submitted to ApJ