Extreme ionizing properties of a metal-poor, MUV ≃ −12 star complex in the first gigayear

Home

All issues

Volume 691 (November 2024)

A&A, 691 (2024) A251

Full HTML

Open Access

Table 1.

Observed and derived properties of the T2 family.

Quantity	T2	T2c	T2c-tails	full-T2c
m_UV, m_opt [2000, 5000 Å]	27.60(0.10), 28.31(0.07)	> 31.13, > 30.50	> 30.80, > 30.15	> 30.52, > 29.90
M_UV [2000 Å]	−15.97 ± 0.15	> − 12.22	> − 13.08	> − 12.80
Hα [10⁻¹⁹ cgs ]	15.51 ± 0.68	2.94 ± 0.46	3.19 ± 0.65	6.03 ± 0.86
Hα/Hβ	2.73 ± 0.28	2.53 ± 0.90	2.40 ± 1.05	2.60 ± 0.90
[O III]λ500 [10⁻¹⁹ cgs ]	21.40 ± 0.77	2.30 ± 0.33	2.31 ± 0.58	4.48 ± 0.67
EW(Hα) [Å]	907 ± 70	> 1300 ^(⋆)	> 1030	≳1540
EW(5007) [Å]	736 ± 56	> 600	≳430	≳670
log(ξ_ion [Hz erg⁻¹])	25.39 ± 0.05	≳26.08 ^(♣)	≳25.98 ^(♣)	≳26.15 ^(♣)
R3 $[\frac{[O I I I] λ 5007}{H α / 2.86}]$ $\left[\frac{{[\mathrm{O}\textsc{iii}]\lambda5007}}{\mathrm{H}\alpha /2.86}\right]$	4.0 ± 0.2	2.5 ± 0.6	2.0 ± 0.6	2.1 ± 0.5
Z(%), 12+log(O/H) ^(†)	$5 . 0_{- 1.3}^{+ 1.8}$ $5.0^{+1.8}_{-1.3}$ , 7.4	$2 . 8_{- 1.1}^{+ 1.7}$ $2.8^{+1.7}_{-1.1}$ , 7.1	$2 . 3_{- 1.0}^{+ 1.4}$ $2.3^{+1.4}_{-1.0}$ , 7.1	$2 . 4_{- 0.9}^{+ 1.3}$ $2.4^{+1.3}_{-0.9}$ , 7.1
μ [tot, tang] ^(‡)	18.4, 14.6	23.1, 17.8	23.1, 17.8	23.1, 17.8

Notes. Measured magnitudes and fluxes. De-lensed magnitudes can be derived by adding 2.5log₁₀(μ_tot) to the observed magnitudes, and de-lensed fluxes can be derived by dividing the observed fluxes by μ_tot. The total and tangential magnification values are reported in the last row (“tot” and “tang”) and have a 10% relative statistical error (Bergamini et al. 2023). The magnitude limits are derived from the stacked F115W+F150W+F200W image (ultraviolet rest frame, m_UV) and F410M (optical rest frame, m_opt), computed at 3σ within the apertures as indicated in Fig. 3 (bottom-right panel). The reported errors on magnitude and flux measurements are at a 1σ confidence level, and, if not specified in the table, lower limits are reported at 3σ. Line fluxes are reported in cgs units, corresponding to erg s⁻¹ cm⁻².

^(†)From Asplund et al. (2009), Z_⊙ ⇒ 8.69 = 12+log(O/H).

^(⋆)Based on an F410M magnitude limit only; however, after combining F410M and F444W (removing the Hα flux contribution in F444W), the 3-sigma limit of the optical continuum increases to > 31, corresponding to EW(Hα)> 2080 Å.

^(‡)Typical 1σ error of 10%.

^(♣)The reported 3σ limits on the ξ_ion decrease of 0.22 dex when relaxing to 5σ.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.