He II emitters at cosmic noon and beyond - Characterising the He II λ1640 emission with MUSE and JWST/NIRSpec

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Volume 702 (October 2025)

A&A, 702 (2025) A3

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Table B1.

General characteristics of the He II emitters sample.

ID	RA	DEC	EW(Lyα)	EW(He II )	z	M_⋆	SFR	A_V	M₁₅₀₀
	J2000	J2000	Å	Å		log(M/M_⊙)	log(M_⊙ · yr⁻¹
7898	03:32:34.778	-27:47:59.447		12.4±2.9	2.867			0.351±0.058	-16.426±0.086
8249	03:32:37.931	-27:47:39.686	12.4±2.0	1.9±0.5	2.955			1.259±0.017	-22.968±0.025
1059	03:32:36.826	-27:45:58.029	223.1±44.8	7.9±1.3	3.806	$9 . 813_{- 0.459}^{0.685}$ $9.813^{0.685}_{-0.459}$	$1 . 466_{- 0.427}^{+ 0.483}$ $1.466^{+0.483}_{-0.427}$	0.877±0.008	-19.955±0.012
1141*	03:32:39.617	-27:47:37.179		1.8±0.2	2.344	$9 . 709_{- 0.343}^{0.423}$ $9.709^{0.423}_{-0.343}$	$0 . 869_{- 0.341}^{+ 0.287}$ $0.869^{+0.287}_{-0.341}$	0.807±0.011	-19.034±0.017
50*	03:32:39.083	-27:46:17.855	24.9±13.7	3.4±0.5	3.325	$9 . 997_{- 0.327}^{0.246}$ $9.997^{0.246}_{-0.327}$	$1 . 137_{- 0.289}^{+ 0.286}$ $1.137^{+0.286}_{-0.289}$	0.802±0.006	-18.99±0.009
6664	03:32:38.962	-27:47:03.994		2.2±0.2	2.391	$9 . 506_{- 0.236}^{0.218}$ $9.506^{0.218}_{-0.236}$	$0 . 363_{- 0.247}^{+ 0.589}$ $0.363^{+0.589}_{-0.247}$	0.618±0.009	-18.167±0.014
8165	03:32:39.698	-27:46:48.250		5.7±1.3	2.338	$7 . 983_{- 0.372}^{0.682}$ $7.983^{0.682}_{-0.372}$	$- 0 . 69_{- 0.415}^{+ 0.744}$ $-0.69^{+0.744}_{-0.415}$	0.31±0.028	-15.755±0.042
149	03:32:40.287	-27:46:43.113	469.3±24.6	12.1±1.3	3.721	$8 . 953_{- 0.315}^{0.392}$ $8.953^{0.392}_{-0.315}$	$0 . 272_{- 0.306}^{+ 0.438}$ $0.272^{+0.438}_{-0.306}$	1.598±0.128	-19.934±0.189
8414	03:32:41.061	-27:47:20.897		11.0±2.5	2.844	$8 . 561_{- 0.281}^{0.289}$ $8.561^{0.289}_{-0.281}$	$- 0 . 227_{- 0.246}^{+ 0.497}$ $-0.227^{+0.497}_{-0.246}$	0.319±0.026	-14.977±0.039
103	03:32:39.919	-27:46:47.418	8.0±4.1	1.4±0.7	2.994			0.622±0.012	-18.014±0.018
3621	03:32:39.525	-27:48:53.532	882.4±10.9	31.5±2.8	3.062	$8 . 851_{- 0.471}^{0.384}$ $8.851^{0.384}_{-0.471}$	$- 0 . 098_{- 0.322}^{+ 1.246}$ $-0.098^{+1.246}_{-0.322}$	0.722±0.211	-21.282±0.31
8369	03:32:40.774	-27:47:27.606		5.6±1.3	2.344	$8 . 114_{- 0.358}^{0.361}$ $8.114^{0.361}_{-0.358}$	$- 1 . 301_{- 0.33}^{+ 2.397}$ $-1.301^{+2.397}_{-0.33}$	0.137±0.027	-15.141±0.04
6700	03:32:40.387	-27:46:51.802	136.7±0.9	3.2±0.5	2.994	$9 . 065_{- 0.785}^{0.351}$ $9.065^{0.351}_{-0.785}$	$0 . 179_{- 0.434}^{+ 0.778}$ $0.179^{+0.778}_{-0.434}$	0.342±0.005	-17.608±0.007
1045	03:32:33.780	-27:48:14.354		3.6±0.5	2.616	$9 . 33_{- 0.299}^{0.497}$ $9.33^{0.497}_{-0.299}$	$0 . 608_{- 0.286}^{+ 0.822}$ $0.608^{+0.822}_{-0.286}$	0.454±0.008	-19.007±0.012
6999	03:32:38.297	-27:47:28.514	227.2±15.7	5.6±1.5	3.427	$8 . 729_{- 0.326}^{0.225}$ $8.729^{0.225}_{-0.326}$	$- 0 . 178_{- 0.295}^{+ 0.438}$ $-0.178^{+0.438}_{-0.295}$	0.758±0.019	-17.062±0.029
164	03:32:40.643	-27:47:05.944		7.7±1.2	1.907	$8 . 118_{- 0.285}^{0.523}$ $8.118^{0.523}_{-0.285}$	$- 0 . 787_{- 0.186}^{+ 0.76}$ $-0.787^{+0.76}_{-0.186}$
6666	03:32:38.290	-27:46:36.267	221.8±2.2	15.8±1.7	3.434	$9 . 471_{- 0.43}^{0.366}$ $9.471^{0.366}_{-0.43}$	$0 . 878_{- 0.289}^{+ 0.312}$ $0.878^{+0.312}_{-0.289}$	0.762±0.008	-18.76±0.012
1024	03:32:31.454	-27:47:25.116		4.7±0.6	2.868	$10 . 074_{- 0.519}^{0.244}$ $10.074^{0.244}_{-0.519}$	$1 . 326_{- 0.351}^{+ 0.372}$ $1.326^{+0.372}_{-0.351}$	0.619±0.007	-19.328±0.01
1273	03:32:35.475	-27:46:16.915		10.2±0.7	2.172	$9 . 045_{- 0.463}^{0.483}$ $9.045^{0.483}_{-0.463}$	$0 . 162_{- 0.232}^{+ 0.762}$ $0.162^{+0.762}_{-0.232}$		-17.107±0.03
22*	03:32:37.071	-27:46:17.176		2.6±0.2	2.226	$10 . 415_{- 0.236}^{0.21}$ $10.415^{0.21}_{-0.236}$	$1 . 422_{- 0.282}^{+ 0.458}$ $1.422^{+0.458}_{-0.282}$	1.262±0.012	-21.387±0.017
1036	03:32:43.387	-27:47:10.541		4.4±0.6	2.69	$9 . 317_{- 0.493}^{0.527}$ $9.317^{0.527}_{-0.493}$	$0 . 374_{- 0.423}^{+ 1.459}$ $0.374^{+1.459}_{-0.423}$	0.401±0.007	-18.942±0.01
1056	03:32:39.670	-27:48:50.598	105.5±58.2	12.5±0.6	3.063	$11 . 631_{- 0.498}^{0.142}$ $11.631^{0.142}_{-0.498}$	$1 . 356_{- 0.379}^{+ 4.193}$ $1.356^{+4.193}_{-0.379}$	2.577±0.015	-23.591±0.022
51	03:32:39.643	-27:46:53.809		5.1±0.2	2.229	$9 . 405_{- 0.267}^{0.254}$ $9.405^{0.254}_{-0.267}$	$0 . 417_{- 0.221}^{+ 0.476}$ $0.417^{+0.476}_{-0.221}$	0.608±0.066	-20.378±0.098
106	03:32:39.294	-27:46:44.671	215.2±16.1	10.0±1.5	3.276	$9 . 165_{- 0.398}^{0.368}$ $9.165^{0.368}_{-0.398}$	$0 . 394_{- 0.272}^{+ 0.557}$ $0.394^{+0.557}_{-0.272}$	0.334±0.015	-16.843±0.022
1051	03:32:42.837	-27:47:02.532	16.6±4.8	6.3±0.2	3.19	$10 . 807_{- 0.258}^{0.276}$ $10.807^{0.276}_{-0.258}$	$2 . 52_{- 0.354}^{+ 0.256}$ $2.52^{+0.256}_{-0.354}$	0.57±0.045	-20.243±0.066

Notes. ID, RA, DEC, z, M_⋆ and SFR values were taken from the AMUSED database (Bacon et al. 2023). For galaxies with ID: 7898, 8249 and 103, the SED was not performed due to the lack of HST photometric data. Consequently, the M_⋆ and SFR values were not calculated and are left as blank spaces in the table. The A_V from the β slope, M₁₅₀₀ and rest-frame EWs were calculated in this work (see section 2.1). The A_V obtained using the Paschen series for the galaxies marked by an asterisk can be found in table 1. The two AGNs (ID:1056 and ID:1051) which present broad He II, [C III] and C IV features are marked in bold face.

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