JADES Imaging of GN-z11: Revealing the Morphology and Environment of a Luminous Galaxy 430 Myr after the Big Bang
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Author
Tacchella, Sandro
Eisenstein, Daniel J.
Hainline, Kevin
Johnson, Benjamin D.
Baker, William M.
Helton, Jakob M.
Robertson, Brant
Suess, Katherine A.
Chen, Zuyi
Nelson, Erica
Puskás, Dávid
Sun, Fengwu
Alberts, Stacey
Egami, Eiichi
Hausen, Ryan
Rieke, George
Rieke, Marcia
Shivaei, Irene
Willmer, Christopher N. A.
Bunker, Andrew
Cameron, Alex J.
Carniani, Stefano
Charlot, Stephane
Curti, Mirko
Curtis-Lake, Emma
Looser, Tobias J.
Maiolino, Roberto
Maseda, Michael V.
Rawle, Tim
Rix, Hans-Walter
Smit, Renske
Übler, Hannah
Willott, Chris
Witstok, Joris
Baum, Stefi
Bhatawdekar, Rachana
Boyett, Kristan
Danhaive, A. Lola
Graaff, Anna de
Endsley, Ryan
Ji, Zhiyuan
Lyu, Jianwei
Sandles, Lester
Saxena, Aayush
Scholtz, Jan
Topping, Michael W.
Whitler, Lily
Attention
2299/26555
Abstract
We present JWST NIRCam nine-band near-infrared imaging of the luminous z = 10.6 galaxy GN-z11 from the JWST Advanced Deep Extragalactic Survey of the GOODS-N field. We find a spectral energy distribution (SED) entirely consistent with the expected form of a high-redshift galaxy: a clear blue continuum from 1.5 to 4 μm with a complete dropout in F115W. The core of GN-z11 is extremely compact in JWST imaging. We analyze the image with a two-component model, using a point source and a Sérsic profile that fits to a half-light radius of 200 pc and an index n = 0.9. We find a low-surface-brightness haze about 04 to the northeast of the galaxy, which is most likely a foreground object but might be a more extended component of GN-z11. At a spectroscopic redshift of 10.60 (Bunker et al. 2023), the comparison of the NIRCam F410M and F444W images spans the Balmer jump. From population-synthesis modeling, here assuming no light from an active galactic nucleus, we reproduce the SED of GN-z11, finding a stellar mass of ∼109M⊙, a star formation rate of ∼20 M⊙ yr−1, and a young stellar age of ∼20 Myr. Since massive galaxies at high redshift are likely to be highly clustered, we search for faint neighbors of GN-z11, finding nine galaxies out to ∼5 comoving Mpc transverse with photometric redshifts consistent with z = 10.6, and a tenth more tentative dropout only 3'' away. This is consistent with GN-z11 being hosted by a massive dark-matter halo (≈8 × 1010M⊙), though lower halo masses cannot be ruled out.
Publication date
2023-07-20Published in
The Astrophysical JournalPublished version
https://doi.org/10.3847/1538-4357/acdbc6Other links
http://hdl.handle.net/2299/26555Metadata
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