J/ApJ/961/69 JADES and FRESCO Ha-emitting galaxies at z=5.1-5.5 (Sun+, 2024)
JADES: resolving the stellar component and filamentary overdense environment of
Hubble Space Telescope (HST)-dark submillimeter galaxy HDF850.1 at z=5.18.
Sun F., Helton J.M., Egami E., Hainline K.N., Rieke G.H., Willmer C.N.A.,
Eisenstein D.J., Johnson B.D., Rieke M.J., Robertson B., Tacchella S.,
Alberts S., Baker W.M., Bhatawdekar R., Boyett K., Bunker A.J.,
Charlot S., Chen Z., Chevallard J., Curtis-Lake E., Danhaive A.L.,
DeCoursey C., Ji Z., Lyu J., Maiolino R., Rujopakarn W., Sandles L.,
Shivaei I., Ubler H., Willott C., Witstok J.
<Astrophys. J., 961, 69 (2024)>
=2024ApJ...961...69S 2024ApJ...961...69S
ADC_Keywords: Galaxies, spectra; Redshifts; Photometry, infrared;
Magnitudes, absolute; Ultraviolet; Photometry, H-alpha; Surveys
Keywords: High-redshift galaxies ; Luminous infrared galaxies ;
Ultraluminous infrared galaxies ; Galaxy evolution ;
James Webb Space Telescope
Abstract:
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 0.8-5.0µm 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-βUV). 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±0.1M☉ and star formation rate (SFR) of
102.8±0.2M☉/yr, 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 3.9-5µm, 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.
Description:
We conducted JWST/NIRCam imaging observations in the GOODS-N field
through the JADES program (project ID, hereafter PID: 1181;
PI: Eisenstein) in early 2023 February. The detailed observation
design is presented in Eisenstein+ (2026ApJS..283....6E 2026ApJS..283....6E).
Our NIRCam observations consist of three medium-depth pointings with
MIRI as parallel instrument (12.2hr in total; the NIRCam data were
partially presented in Tacchella+ 2023ApJ...952...74T 2023ApJ...952...74T), and four
deeper pointings with NIRSpec as primary instrument (31.5hr in total;
the NIRSpec data were partially presented in Bunker+ 2023A&A...677A..88B 2023A&A...677A..88B).
The total NIRCam survey area is ∼56arcmin2 in the GOODS-N field by
2023 February 8. We used nine photometric filters from 0.8 to 5.0um,
including F090W, F115W, F150W, F200W, F277W, F335M, F356W, F410M, and
F444W filters. The total exposure time at the location of HDF850.1 is
6.30hr in the F115W band and 3.15hr in each of the other eight bands.
The JWST/NIRCam wide-field slitless spectroscopy (WFSS) observations
of the GOODS-N field were obtained on UT 2023 February 11-13 through
the First Reionization Epoch Spectroscopic COmplete Survey (FRESCO;
Oesch+ 2023MNRAS.525.2864O 2023MNRAS.525.2864O; PI: Oesch, PID: 1895). FRESCO observed
both the GOODS-N and GOODS-S fields using the row-direction grisms on
both modules of NIRCam with the F444W filter (3.9-5.0um). The spectral
resolution is R∼1600 at 4um. The total overlapping area between the
JADES and FRESCO footprints is ∼35arcmin2 in GOODS-N. The total
spectroscopic observing time for FRESCO per GOODS field is ∼16hr with
a typical on-source time of ∼2hr.
In Section 5.1, we describe the selection and spectra analysis for
146 Hα-emitting galaxies at z=5.1-5.5.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
12 36 51.98 +62 12 25.7 HDF850.1 = [HSD98] HDF850.1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 88 140 *Summary of spectroscopically confirmed
Hα-emitting galaxies at z=5.1-5.5
(see Appendix)
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Note on table2.dat: Figure A1 shows the NIRCam cutout images and extracted 2D
and 1D grism spectra for 140 galaxies at z=5.1-5.5 that we
spectroscopically confirmed with ≥5σ detection of Hα line
emission. We note that the spectrum of HDF850.1 is not shown in this
figure because it is presented in Figure 6. The cutout images and
spectra of five AGN candidates identified through broad Hα
emission lines are also not shown in the table.
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See also:
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
V/159 : JADES NIRCam & NIRSpec phot. & line fluxes (DR1-DR3) (Rieke+, 2023)
J/ApJ/513/34 : HDF photometric redshifts catalog (Fernandez-Soto+, 1999)
J/MNRAS/358/149 : HDFN SCUBA Super-map. III (Pope+, 2005)
J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008)
J/ApJ/692/556 : Star forming galaxy templates (Rieke+, 2009)
J/ApJ/762/46 : SHARDS: GOODS-N spectrophot. survey (Perez-Gonzalez+, 2013)
J/A+A/562/A35 : Radio spectra of HDF850.1 (Neri+, 2014)
J/ApJ/788/125 : ALMA survey of ECDFS submillimeter galaxies (Simpson+, 2014)
J/ApJS/219/15 : Morphologies of z=0-10 gal. with HST data (Shibuya+, 2015)
J/ApJ/837/139 : SUPER GOODS. I. Ultradeep SCUBA-2 survey (Cowie+, 2017)
J/ApJ/850/83 : DANCING-ALMA. I. submm/mm cont. sources (Fujimoto+, 2017)
J/MNRAS/478/3740 : High-z LAEs and LBGs in SHARDS survey (Arrabal Haro+, 2018)
J/ApJ/869/4 : FIR SED measurements of massive galaxies (De Rossi+, 2018)
J/A+A/609/A30 : Conversion factors to LIR & Mdust (Schreiber+, 2018)
J/ApJ/876/135 : 33 Optically faint galaxies (Alcalde Pampliega+, 2019)
J/ApJ/877/103 : Half-mass radii for galaxies at 1.0≤z≤2.5 (Suess+, 2019)
J/ApJS/244/16 : HLF photometric catalog in GOODS-S v2.1 (Whitaker+, 2019)
J/A+A/643/A2 : ALPINE DR1 merged catalog (Bethermin+, 2020)
J/MNRAS/494/3828 : ALMA survey of SCUBA-2 CLS UDS field (Dudzeviciute+, 2020)
J/A+A/643/A4 : ALPINE-ALMA [CII] survey. IR luminosity (Fudamoto+, 2020)
J/ApJ/923/215 : MORA: ALMA 2mm survey (Casey+, 2021)
J/A+A/649/A31 : [CCJ2015b] HZ4 [CII] 158um datacube (Herrera-Camus+, 2021)
J/ApJ/921/40 : FIR data of SFGs in GOODS-N & COSMOS fields (Kokorev+, 2021)
J/ApJS/257/68 : Spitzer/IRAC full-depth phot. from GREATS (Stefanon+, 2021)
J/ApJ/937/L33 : JWST morphological data at 4.4um & 1.5um (Suess+, 2022)
J/ApJ/932/77 : ALCS: ALMA-Herschel study of 1.15mm sources (Sun+, 2022)
J/ApJ/950/66 : EIGER. I. [OIII]-emitting gal. at 5.3<z<6.9 (Kashino+, 2023)
J/ApJ/946/L16 : CEERS Key Paper. IV. JWST & HST data (Perez-Gonzalez+, 2023)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/140] Sequential identifier
5- 13 A9 --- --- [JADES-GN-]
14- 31 A18 --- JADES-GN JADES/GOODS North position-based name
(DDD.ddddd+DD.ddddd; ICRS)
33- 41 F9.5 deg RAdeg [189/189.4] Right Ascension (ICRS)
43- 51 F9.5 deg DEdeg [62.1/62.4] Declination (ICRS)
53- 57 F5.3 --- zspec [5.1/5.5] Spectroscopic redshift (1)
59- 64 F6.2 mag UVMag [-21.12/-17.13] Absolute AB magnitude at
rest-frame UV (1500 Angstrom)
66- 69 F4.2 mag e_UVMag [0.03/0.4] Uncertainty in UVMag
71- 75 F5.2 mag F444W [24.48/28.02] JWST/NIRCam F444W band AB
magnitude (2)
77- 81 F5.2 10-21W/m2 FHa [1.1/41] Hα line flux,
10-18erg/s/cm2
83- 86 F4.2 10-21W/m2 e_FHa [0.18/5.2] Uncertainty in FHa
88 A1 --- Group Galaxy Group (3)
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Note (1): The typical uncertainty of the grism spectroscopic redshift,
e_zspec, is 0.001.
Note (2): The uncertainty of F444W magnitude is dominated by flux
calibration and aperture correction and we adopt a 5% noise floor.
Note (3): In the group ID column, "F" denotes field galaxies while
other number IDs are assigned through our FoF clustering analysis
(Section 5.2). HDF850.1 and five AGN candidates with broad Hα
emission lines are not included in this table.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 07-Apr-2026