Revealing the hidden cosmic feast: A z = 4.3 galaxy group hosting two optically dark, efficiently star-forming galaxies

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Volume 694 (February 2025)

A&A, 694 (2025) A218

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Table C.1.

SED fitting result for CGG-z4 group galaxies.

ID(COSMOS)	z	logM_⋆/M_⊙	SFR	A_V	Z	Age
		[dex]	[M_⊙ yr⁻¹]		[Z_⊙]	[Gyr]
(1)	(2)	(3)	(4)	(5)	(6)	(7)
Spec-z

CGG-z4.a	4.331	10.77 $_{- 0.49}^{+ 0.51}$ $^{+0.51}_{-0.49}$	1408±86
CGG-z4.b	4.324	10.56 $_{- 0.26}^{+ 0.42}$ $^{+0.42}_{-0.26}$	703±65

Photo-z

353556	4.44 $_{- 0.15}^{+ 0.23}$ $^{+0.23}_{-0.15}$	10.33 $_{- 0.27}^{+ 0.15}$ $^{+0.15}_{-0.27}$	241 $_{- 114}^{+ 117}$ $^{+117}_{-114}$	1.29 $_{- 0.31}^{+ 0.27}$ $^{+0.27}_{-0.31}$	0.07 $_{- 0.05}^{+ 0.32}$ $^{+0.32}_{-0.05}$	0.02 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$
354768	4.37 $_{- 0.03}^{+ 0.06}$ $^{+0.06}_{-0.03}$	9.81 $_{- 0.20}^{+ 0.15}$ $^{+0.15}_{-0.20}$	71 $_{- 27}^{+ 31}$ $^{+31}_{-27}$	1.31 $_{- 0.44}^{+ 0.74}$ $^{+0.74}_{-0.44}$	0.05 $_{- 0.04}^{+ 0.08}$ $^{+0.08}_{-0.04}$	0.01 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$
355293	3.87 $_{- 0.24}^{+ 0.20}$ $^{+0.20}_{-0.24}$	8.51 $_{- 0.71}^{+ 0.65}$ $^{+0.65}_{-0.71}$	2 $_{- 1}^{+ 4}$ $^{+4}_{-1}$	0.57 $_{- 0.40}^{+ 1.22}$ $^{+1.22}_{-0.40}$	0.04 $_{- 0.02}^{+ 0.07}$ $^{+0.07}_{-0.02}$	0.05 $_{- 0.04}^{+ 0.22}$ $^{+0.22}_{-0.04}$
358735	4.54 $_{- 0.16}^{+ 0.11}$ $^{+0.11}_{-0.16}$	9.28 $_{- 0.37}^{+ 0.53}$ $^{+0.53}_{-0.37}$	12 $_{- 7}^{+ 27}$ $^{+27}_{-7}$	1.37 $_{- 0.90}^{+ 1.35}$ $^{+1.35}_{-0.90}$	0.53 $_{- 0.41}^{+ 0.74}$ $^{+0.74}_{-0.41}$	0.10 $_{- 0.07}^{+ 0.17}$ $^{+0.17}_{-0.07}$
358920	4.35 $_{- 0.20}^{+ 0.13}$ $^{+0.13}_{-0.20}$	9.75 $_{- 0.16}^{+ 0.12}$ $^{+0.12}_{-0.16}$	64 $_{- 20}^{+ 20}$ $^{+20}_{-20}$	1.11 $_{- 0.29}^{+ 0.38}$ $^{+0.38}_{-0.29}$	0.03 $_{- 0.02}^{+ 0.06}$ $^{+0.06}_{-0.02}$	0.01 $_{- 0.01}^{+ 0.01}$ $^{+0.01}_{-0.01}$
361346	3.90 $_{- 0.17}^{+ 0.18}$ $^{+0.18}_{-0.17}$	9.43 $_{- 0.17}^{+ 0.63}$ $^{+0.63}_{-0.17}$	6 $_{- 2}^{+ 21}$ $^{+21}_{-2}$	0.46 $_{- 0.32}^{+ 1.71}$ $^{+1.71}_{-0.32}$	0.02 $_{- 0.01}^{+ 0.02}$ $^{+0.02}_{-0.01}$	0.38 $_{- 0.13}^{+ 0.08}$ $^{+0.08}_{-0.13}$
362449	4.33 $_{- 0.27}^{+ 0.18}$ $^{+0.18}_{-0.27}$	$10 . 18_{- 0.25}^{+ 0.27}$ $10.18^{+0.27}_{-0.25}$	$148_{- 56}^{+ 159}$ $148^{+159}_{-56}$	$1 . 52_{- 0.41}^{+ 0.52}$ $1.52^{+0.52}_{-0.41}$	$0 . 20_{- 0.16}^{+ 0.79}$ $0.20^{+0.79}_{-0.16}$	$0 . 02_{- 0.01}^{+ 0.04}$ $0.02^{+0.04}_{-0.01}$
353918	4.51 $_{- 0.12}^{+ 0.16}$ $^{+0.16}_{-0.12}$	$9 . 20_{- 0.11}^{+ 0.08}$ $9.20^{+0.08}_{-0.11}$	$17_{- 4}^{+ 4}$ $17^{+4}_{-4}$	$0 . 36_{- 0.10}^{+ 0.18}$ $0.36^{+0.18}_{-0.10}$	$0 . 02_{- 0.01}^{+ 0.01}$ $0.02^{+0.01}_{-0.01}$	$0 . 01_{- 0.01}^{+ 0.01}$ $0.01^{+0.01}_{-0.01}$
357448	4.62 $_{- 0.08}^{+ 0.10}$ $^{+0.10}_{-0.08}$	$8 . 88_{- 0.21}^{+ 0.13}$ $8.88^{+0.13}_{-0.21}$	$9_{- 4}^{+ 3}$ $9^{+3}_{-4}$	$0 . 19_{- 0.09}^{+ 0.16}$ $0.19^{+0.16}_{-0.09}$	$0 . 05_{- 0.04}^{+ 0.28}$ $0.05^{+0.28}_{-0.04}$	$0 . 03_{- 0.01}^{+ 0.02}$ $0.03^{+0.02}_{-0.01}$
355779	4.02 $_{- 0.26}^{+ 0.15}$ $^{+0.15}_{-0.26}$	$10 . 19_{- 0.59}^{+ 0.42}$ $10.19^{+0.42}_{-0.59}$	$41_{- 31}^{+ 73}$ $41^{+73}_{-31}$	$2 . 53_{- 1.33}^{+ 0.99}$ $2.53^{+0.99}_{-1.33}$	$0 . 03_{- 0.01}^{+ 0.05}$ $0.03^{+0.05}_{-0.01}$	$0 . 31_{- 0.18}^{+ 0.14}$ $0.31^{+0.14}_{-0.18}$
361388	4.23 $_{- 0.09}^{+ 0.09}$ $^{+0.09}_{-0.09}$	10.44 $_{- 0.23}^{+ 0.23}$ $^{+0.23}_{-0.23}$	$115_{- 55}^{+ 121}$ $115^{+121}_{-55}$	$3 . 01_{- 0.71}^{+ 0.58}$ $3.01^{+0.58}_{-0.71}$	$0 . 03_{- 0.02}^{+ 0.06}$ $0.03^{+0.06}_{-0.02}$	$0 . 19_{- 0.12}^{+ 0.20}$ $0.19^{+0.20}_{-0.12}$

Total

CGG-z4	4.30 $_{- 0.14}^{+ 0.12}$ $^{+0.12}_{-0.14}$	11.29 $_{- 0.33}^{+ 0.38}$ $^{+0.38}_{-0.33}$	2837 $_{- 472}^{+ 731}$ $^{+731}_{-472}$

Notes. CGG-z4.a,b were fitted using the MICHI2 SED fitting code of Liu (2020, 2021) to determine the SFR. For galaxies with photometric redshift, results are the median photometric redshift from EAZY SED fitting with Classic COSMOS2020 photometry, and the remaining parameters were computed by BAGPIPES at the spectroscopic redshift of CGG-z4.a, assuming a constant SFH and a Salim et al. (2018) attenuation curve. Columns: (1) Name/COSMOS2020 catalog ID; (2) Redshift; (3) The stellar mass; (4) The star formation rate; (5) Reddening using a Salim et al. (2018) dust law; (6) Metallicity; (7) Mass-weighted age.

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