JADES: Carbon enrichment 350 Myr after the Big Bang

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Volume 689 (September 2024)

A&A, 689 (2024) A152

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Table 4.

Adjustable parameters and associated priors used in the BEAGLE analysis.

Parameter	Symbol	Prior
Redshift	z	𝒩(12.48, 0.05)
Stellar mass formed (integral of the SFH)	log(M_⋆/M_⊙)	𝒰 ∈ [6, 12]
Metallicity of stars with t > 10 Myr	log(Z_⋆/Z_⊙)	𝒰 ∈ [ − 2.2, 0.4]
Age of the oldest stars	log(t/yr)	𝒰 ∈ [6, 10.8 ^(a)]
Timescale of the delayed exponential SFH	log(τ/yr)	𝒰 ∈ [6, 12]
SFR during the last 10 Myr of the SFH	log(SFR/M_⊙yr⁻¹)	𝒰 ∈ [ − 4, 4]
V-band attenuation optical depth	${\hat{τ}}_{V}$ ${\hat{\tau}_{\mathrm{V}}}$	$exp (- {\hat{τ}}_{V}) \in [0, 6]$ $\exp(-{\hat{\tau}_{\mathrm{V}}}) \in [0, 6]$
Ionisation parameter	log (U)	𝒰 ∈ [ − 4, −1]
Dust-to-metal mass ratio	ξ_d	𝒰 ∈ [0.1, 0.5]
ISM metallicity	log(Z_ISM/Z_⊙)	𝒰 ∈ [ − 2.2, 0.4]
Carbon-to-Oxygen abundance	[C/O]	𝒰 ∈ [ − 1, 0.15]

Notes. 𝒩(a, b) indicates a Normal distribution with mean a and standard deviation b; 𝒰 ∈ [a, b] indicates a Uniform distribution between a and b.

^(a)

In practice, BEAGLE will not allow the age of the oldest stars to be greater than the time elapsed between z_max = 30 and the sampled redshift.

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