Gas-phase metallicity gradients in galaxies at z ∼ 6–8

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Volume 691 (November 2024)

A&A, 691 (2024) A19

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Table 3.

Properties of the individual sources.

Source	z	log(M_*/M_⊙)	F_[O II]	F_[Ne III]	F_Hβ	F_[O III]	F_Hα	F_[S II]	SFR	12+log(O/H)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)
A2744-YD4
YD4	7.879	8.69 $_{- 0.17}^{+ 0.18}$ $^{+0.18}_{-0.17}$	72 ± 3	< 21	36 ± 3	180 ± 4	–	–	2.2 $_{- 0.2}^{+ 0.2}$ $^{+0.2}_{-0.2}$	8.19 $_{- 0.13}^{+ 0.09}$ $_{-0.13}^{+0.09}$
YD6	7.880	8.40 $_{- 0.13}^{+ 0.27}$ $^{+0.27}_{-0.13}$	26 ± 3	< 20	< 17	44 ± 3	–	–	< 1.0	8.27 $_{- 0.20}^{+ 0.16}$ $_{-0.20}^{+0.16}$
YD6-[O III]-E	7.881	7.83 $_{- 0.22}^{+ 0.46}$ $^{+0.46}_{-0.22}$	< 24	< 24	< 14	57 ± 3	–	–	< 0.87
YD4-[O III]-W	7.877	7.82 $_{- 0.48}^{+ 0.41}$ $^{+0.41}_{-0.48}$	< 14	< 15	< 19	46±3	–	–	< 1.1
ZD1	7.872	7.58 $_{- 0.37}^{+ 0.18}$ $^{+0.18}_{-0.37}$	< 13	< 13	< 18	27 ± 3	–	–	< 1.1
YD1	7.883	8.58 $_{- 0.19}^{+ 0.28}$ $^{+0.28}_{-0.19}$	107 ± 4	< 24	47 ± 3	346 ± 3	–	–	2.85 $_{- 0.18}^{+ 0.18}$ $^{+0.18}_{-0.18}$	8.11 $_{- 0.07}^{+ 0.05}$ $_{-0.07}^{+0.05}$
YD1-E	7.882	8.44 $_{- 0.23}^{+ 0.43}$ $^{+0.43}_{-0.23}$	54 ± 3	< 20	34 ± 2	270 ± 2	–	–	2.02 $_{- 0.13}^{+ 0.13}$ $^{+0.13}_{-0.13}$	7.98 $_{- 0.09}^{+ 0.07}$ $_{-0.09}^{+0.07}$
s1	7.878	8.01 $_{- 0.47}^{+ 0.28}$ $^{+0.28}_{-0.47}$	< 24	< 25	18 ± 3	151 ± 3	–	–	1.09 $_{- 0.16}^{+ 0.16}$ $^{+0.16}_{-0.16}$	7.72 $_{- 0.20}^{+ 0.20}$ $_{-0.20}^{+0.20}$

BDF-3299
a	7.114	7.90 $_{- 0.13}^{+ 0.25}$ $^{+0.25}_{-0.13}$	24 ± 2	< 13	36 ± 1	195 ± 3	–	–	3.47 $_{- 0.13}^{+ 0.13}$ $^{+0.13}_{-0.13}$	7.68 $_{- 0.09}^{+ 0.13}$ $_{-0.09}^{+0.13}$
b	7.114	8.21 $_{- 0.11}^{+ 0.30}$ $^{+0.30}_{-0.11}$	28 ± 2	< 11	44 ± 2	285 ± 4	–	–	4.2 $_{- 0.2}^{+ 0.2}$ $^{+0.2}_{-0.2}$	7.69 $_{- 0.06}^{+ 0.10}$ $_{-0.06}^{+0.10}$
c	7.112	7.62 $_{- 0.14}^{+ 0.44}$ $^{+0.44}_{-0.14}$	< 13	< 12	15 ± 2	93 ± 4	–	–	1.5 $_{- 0.2}^{+ 0.2}$ $^{+0.2}_{-0.2}$	7.80 $_{- 0.38}^{+ 0.15}$ $_{-0.38}^{+0.15}$

COSMOS24108
a	6.361	9.29 $_{- 0.08}^{+ 0.09}$ $^{+0.09}_{-0.08}$	179 ± 5	48 ± 6	53 ± 5	358 ± 5	219 ± 4	34 ± 4	14.4 $_{- 1.3}^{+ 1.3}$ $^{+1.3}_{-1.3}$	8.20 $_{- 0.06}^{+ 0.05}$ $_{-0.06}^{+0.05}$
b	6.358	8.81 $_{- 0.17}^{+ 0.11}$ $^{+0.11}_{-0.17}$	150 ± 6	47 ± 6	72 ± 4	470 ± 4	245 ± 3	< 18	9.8 $_{- 0.3}^{+ 0.3}$ $^{+0.3}_{-0.3}$	8.11 $_{- 0.07}^{+ 0.04}$ $_{-0.07}^{+0.04}$
c	6.359	8.89 $_{- 0.06}^{+ 0.10}$ $^{+0.10}_{-0.06}$	67 ± 5	< 36	28 ± 4	92 ± 4	68 ± 4	< 22	1.74 $_{- 0.09}^{+ 0.09}$ $^{+0.09}_{-0.09}$	8.33 $_{- 0.10}^{+ 0.08}$ $_{-0.10}^{+0.08}$
[O III]-Ea	6.362	8.53 $_{- 0.22}^{+ 0.30}$ $^{+0.30}_{-0.22}$	62 ± 3	36 ± 3	41 ± 3	296 ± 3	183 ± 3	< 21	14.5 $_{- 1.3}^{+ 1.3}$ $^{+1.3}_{-1.3}$	8.01 $_{- 0.12}^{+ 0.08}$ $_{-0.12}^{+0.08}$
[O III]-Eb	6.356	8.40 $_{- 0.32}^{+ 0.72}$ $^{+0.72}_{-0.32}$	44 ± 4	< 24	37 ± 3	244 ± 3	113 ± 3	< 22	3.43 $_{- 0.11}^{+ 0.11}$ $^{+0.11}_{-0.11}$	7.95 $_{- 0.17}^{+ 0.14}$ $_{-0.17}^{+0.14}$

Notes. (1) Source name. (2) Redshift from [O III]λ5008. (3) Stellar mass from SED fitting with BAGPIPES. (4–9) [O II]λλ3727,30, [Ne III]λ3870, Hβ, [O III]λ5008, Hα, and [S II]λ6718,33 measured fluxes (in units of 10⁻²⁰ erg s⁻¹ cm⁻²), (10) SFR (in M_⊙ yr⁻¹), and (11) gas-phase metallicity from emission line Gaussian fitting. For the sources in the A2744-YD4 system, the reported M_* and SFR are corrected for the lensing magnification factor of ∼2 (Morishita et al. 2023; Bergamini et al. 2023); the line fluxes are instead the observed ones. All the properties are obtained from integrated spectra extracted from circular apertures (having radius of 0.15″ for A2744-YD4 and COSMOS24108 and of 0.1″ for BDF-3299) centred on each source. For the line fluxes and SFR, we also report the 3σ upper limits in case of no detection.

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