TY - JOUR
T1 - JADES
T2 - Resolving the Stellar Component and Filamentary Overdense Environment of Hubble Space Telescope (HST)-dark Submillimeter Galaxy HDF850.1 at z = 5.18
AU - Sun, Fengwu
AU - Helton, Jakob M.
AU - Egami, Eiichi
AU - Hainline, Kevin N.
AU - Rieke, George H.
AU - Willmer, Christopher N.A.
AU - Eisenstein, Daniel J.
AU - Johnson, Benjamin D.
AU - Rieke, Marcia J.
AU - Robertson, Brant
AU - Tacchella, Sandro
AU - Alberts, Stacey
AU - Baker, William M.
AU - Bhatawdekar, Rachana
AU - Boyett, Kristan
AU - Bunker, Andrew J.
AU - Charlot, Stephane
AU - Chen, Zuyi
AU - Chevallard, Jacopo
AU - Curtis-Lake, Emma
AU - Danhaive, A. Lola
AU - DeCoursey, Christa
AU - Ji, Zhiyuan
AU - Lyu, Jianwei
AU - Maiolino, Roberto
AU - Rujopakarn, Wiphu
AU - Sandles, Lester
AU - Shivaei, Irene
AU - Übler, Hannah
AU - Willott, Chris
AU - Witstok, Joris
N1 - Publisher Copyright:
© 2024. The Author(s). Published by the American Astronomical Society.
PY - 2024/1/1
Y1 - 2024/1/1
N2 - HDF850.1 is the brightest submillimeter galaxy (SMG) in the Hubble Deep Field. It is known as a heavily dust-obscured star-forming galaxy embedded in an overdense environment at z = 5.18. With nine-band NIRCam images at 0.8-5.0 μm obtained through the JWST Advanced Deep Extragalactic Survey, we detect and resolve the rest-frame UV-optical counterpart of HDF850.1, which splits into two components because of heavy dust obscuration in the center. The southern component leaks UV and Hα photons, bringing the galaxy ∼100 times above the empirical relation between infrared excess and UV continuum slope (IRX-β UV). The northern component is higher in dust attenuation and thus fainter in UV and Hα surface brightness. We construct a spatially resolved dust-attenuation map from the NIRCam images, well matched with the dust continuum emission obtained through millimeter interferometry. The whole system hosts a stellar mass of 1010.8±0.1 M ⊙ and star formation rate (SFR) of 102.8±0.2 M ⊙ yr−1, placing the galaxy at the massive end of the star-forming main sequence at this epoch. We further confirm that HDF850.1 resides in a complex overdense environment at z = 5.17-5.30, which hosts another luminous SMG at z = 5.30 (GN10). The filamentary structures of the overdensity are characterized by 109 Hα-emitting galaxies confirmed through NIRCam slitless spectroscopy at 3.9-5 μm, of which only eight were known before the JWST observations. Given the existence of a similar galaxy overdensity in the GOODS-S field, our results suggest that 50% ± 20% of the cosmic star formation at z = 5.1-5.5 occur in protocluster environments.
AB - HDF850.1 is the brightest submillimeter galaxy (SMG) in the Hubble Deep Field. It is known as a heavily dust-obscured star-forming galaxy embedded in an overdense environment at z = 5.18. With nine-band NIRCam images at 0.8-5.0 μm obtained through the JWST Advanced Deep Extragalactic Survey, we detect and resolve the rest-frame UV-optical counterpart of HDF850.1, which splits into two components because of heavy dust obscuration in the center. The southern component leaks UV and Hα photons, bringing the galaxy ∼100 times above the empirical relation between infrared excess and UV continuum slope (IRX-β UV). The northern component is higher in dust attenuation and thus fainter in UV and Hα surface brightness. We construct a spatially resolved dust-attenuation map from the NIRCam images, well matched with the dust continuum emission obtained through millimeter interferometry. The whole system hosts a stellar mass of 1010.8±0.1 M ⊙ and star formation rate (SFR) of 102.8±0.2 M ⊙ yr−1, placing the galaxy at the massive end of the star-forming main sequence at this epoch. We further confirm that HDF850.1 resides in a complex overdense environment at z = 5.17-5.30, which hosts another luminous SMG at z = 5.30 (GN10). The filamentary structures of the overdensity are characterized by 109 Hα-emitting galaxies confirmed through NIRCam slitless spectroscopy at 3.9-5 μm, of which only eight were known before the JWST observations. Given the existence of a similar galaxy overdensity in the GOODS-S field, our results suggest that 50% ± 20% of the cosmic star formation at z = 5.1-5.5 occur in protocluster environments.
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U2 - 10.3847/1538-4357/ad07e3
DO - 10.3847/1538-4357/ad07e3
M3 - Article
AN - SCOPUS:85182567360
SN - 0004-637X
VL - 961
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 69
ER -