JADES: The star formation and chemical enrichment history of a luminous galaxy at z ∼ 9.43 probed by ultra-deep JWST/NIRSpec spectroscopy

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Volume 697 (May 2025)

A&A, 697 (2025) A89

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Table 4.

Derived physical properties for GS-z9-0.

Property	Value
JADES ID	JADES-GS-z9-0
NIRSpec ID [3215]	265801
NIRSpec ID [1210]	10058975
RA	53.1124351
Dec	−27.7746258
z_G395M	9.432681 ± 0.000069
z_PRISM	9.43774 ± 0.00020
M_UV	−20.43
β_UV	−2.54 ± 0.02
log(ξ_ion/erg⁻¹ Hz)	25.64

Morphology (FORCEPHO fitting)
R_e [arcsec]	0.025 ± 0.002
R_e [kpc]	0.110 ± 0.009
PA [degree]	−64 ± 3
axis ratio q	0.44 ± 0.04

SED modelling
BEAGLE
log(M_★/M_⊙)	8.17 $\binom{+ 0.02}{- 0.04}$ ${{+0.02}\atop { -0.04}}$
SFR [M_⊙ yr⁻¹]	4.34 $\binom{+ 0.1}{- 0.08}$ ${{+0.1}\atop { -0.08}}$
log(sSFR/yr⁻¹)	−7.52 $\binom{+ 0.02}{- 0.04}$ ${{+0.02}\atop { -0.04}}$
A_V	0.050 $\binom{+ 0.008}{- 0.006}$ ${{+0.008 }\atop { -0.006}}$
Age_{(light−weighted)} [Myr]	2.80 $\binom{+ 0.06}{- 0.03}$ ${{+0.06}\atop { -0.03}}$
Age_{(oldest stars)} [Myr]	12 $\binom{+ 2}{- 1}$ ${{+2}\atop { -1}}$
log(U)	−1.46 $\binom{+ 0.06}{- 0.04}$ ${{+0.06}\atop { -0.04}}$
Z/Z_⊙	0.046 $\binom{+ 0.002}{- 0.002}$ ${{+0.002}\atop { -0.002}}$
BAGPIPES
log(M_★/M_⊙)	8.18 $\binom{+ 0.06}{- 0.06}$ ${{+0.06 }\atop { -0.06}}$
SFR [M_⊙ yr⁻¹]	5.5 $\binom{+ 0.2}{- 0.2}$ ${{+0.2 }\atop { -0.2}}$
log(sSFR/yr⁻¹)	−7.44 $\binom{+ 0.07}{- 0.07}$ ${{+0.07 }\atop { -0.07}}$
A_V	0.004 $\binom{+ 0.005}{- 0.002}$ ${{+0.005 }\atop { -0.002}}$
Age_{(mass−weighted)} [Myr]	32 $\binom{+ 20}{- 9}$ ${{+20 }\atop { -9}}$
log(U)	−1.06 $\binom{+ 0.03}{- 0.06}$ ${{+0.03 }\atop { -0.06}}$
Z/Z_⊙	0.06 $\binom{+ 0.06}{- 0.06}$ ${{+0.06 }\atop { -0.06}}$

ISM properties (emission lines)
A_V	0.00 ± 0.07
SFR (Hβ) [M_⊙ yr⁻¹]	5.46 ± 1.04
Σ_SFR [M_⊙ yr⁻¹ kpc⁻²]	72 ± 14
n_e [cm⁻³]	650 ± 430
t₃ ( [O III]4363) [K]	20137 ± 1940
t₃ (O III]1666) [K]	24405 ± 1700
12 + log(O⁺/H)	6.00 ± 0.14
12 + log(O⁺⁺/H)	7.38 ± 0.09
12 + log(O/H) (no ICF)	7.40 ± 0.09
ICF(O)	1.23 ± 0.20
12 + log(O/H) (fiducial)	7.49 ± 0.11 ( $\binom{+ 0.11}{- 0.15}$ ${{+0.11 }\atop { -0.15}}$ syst.)
log(C⁺⁺/O⁺⁺)	−0.95 ± 0.12
log(C³⁺/C⁺⁺)	−0.36 ± 0.10
log(C/O) (fiducial)	−0.90 ± 0.12 ( $\binom{+ 0.27}{- 0.19}$ ${{+0.27 }\atop { -0.19}}$ syst.)
[C/O]	−0.64
log(N/O) (fiducial)	−0.93 ± 0.24 ( $\binom{+ 0.28}{- 0.28}$ ${{+0.28 }\atop { -0.28}}$ syst.)
[N/O]	−0.07
log(N/O) ^(†)	−0.77 ± 0.18
[N/O] ^(†)	0.09
log(C/N) (fiducial)	0.03 ± 0.19 ( $\binom{+ 0.24}{- 0.24}$ ${{+0.24 }\atop { -0.24}}$ syst.)
log(Ne/O)	−0.68 ± 0.06
[Ne/O]	−0.05

Notes. Fiducial values on chemical abundances are quoted with both their statistical uncertainties and including (co-added in quadrature) systematic uncertainties, as discussed in Sect. 4.6.

^(†)

Based on marginal N IV] λ1483 detection in the 3 pixel extracted G140M spectrum.

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