Anatomy of an ionized bubble: NIRCam grism spectroscopy of the z = 6.6 double-peaked Lyman-α emitter COLA1 and its environment

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Volume 689 (September 2024)

A&A, 689 (2024) A44

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Table 2.

The physical properties of COLA1.

Property	Value
z^(a)	6.59165
log₁₀(ξ_ion,0/Hz erg⁻¹)^(b)	$25 . 45_{- 0.05}^{+ 0.04}$ $25.45^{+0.04}_{-0.05}$
f_esc(Lyα)^(c)	81 ± 5%
$M_{UV}^{(d)}$ $M_{\mathrm{UV}}^{(d)}$	$- 21 . 35_{- 0.08}^{+ 0.07}$ $-21.35^{+0.07}_{-0.08}$
$β_{UV}^{(e)}$ $\beta_{\mathrm{UV}}^{(e)}$	−3.2 ± 0.4
E(B − V)^(f)	$0 . 00_{- 0.00}^{+ 0.02}$ $0.00^{+0.02}_{-0.00}$
$T_{e}^{(g)}$ $T_{\mathrm{e}}^{(g)}$	$1 . 7_{- 0.3}^{+ 0.4} \times 10^{4}$ $1.7^{+0.4}_{-0.3} \times 10^{4}$ K
EW₀([O III] +Hβ)^(h)	$870_{- 80}^{+ 90}$ $870^{+90}_{-80}$
$12 + {log}_{10} {(O / H)}_{T_{e}}^{(i)}$ $12+\log_{10}\left(\mathrm{O/H}\right)_{T_{\mathrm{e}}}^{(i)}$	$7 . 88_{- 0.30}^{+ 0.33}$ $7.88^{+0.33}_{-0.30}$
$R_{UV}^{(j)}$ $R_{\rm UV} ^{(j)}$	< 0.26 kpc
SFR₀(UV)^(k)	$9 . 6_{- 0.8}^{+ 1.7} M_{⊙}$ $9.6^{+1.7}_{-0.8}\,M_{\odot}$ yr⁻¹
SFR₀(Hβ)^(l)	$10 . 1_{- 0.5}^{+ 0.9} M_{⊙}$ $10.1^{+0.9}_{-0.5}\,M_{\odot}$ yr⁻¹
log₁₀(Σ_SFR/M_⊙ yr⁻¹ kpc⁻²)(UV)^(m)	> 1.31
log₁₀(Σ_SFR/M_⊙ yr⁻¹ kpc⁻²)(Hβ )⁽ⁿ⁾	> 1.36

Notes. ^(a)Redshift, ^(b)ionizing photon production efficiency assuming f_esc = 0, ^(c)Lyα escape fraction, ^(d)1500 Å absolute magnitude, ^(e)power-law slope at 1500 Å, ^(f)dust attenuation coefficient, ^(g)electron temperature, ^(h)[O III] + Hβ rest-frame equivalent width, ⁽ⁱ⁾direct measurement metallicity, ^(j)F200W half-light radius, ^(k, l)star-formation rate assuming f_esc = 0 derived from M_UV and Hβ, respectively; ^(m, n)star formation rate surface density derived from both SFR indicators.

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