This repository contains the emission line fluxes predicted with the Cloudy photoionization code version 17.01 (Ferland et al. 2017) for the star-forming models described in Section 3.1 of Calabro et al. (2023): https://arxiv.org/abs/2306.08605

We use for the calculations the package pyCloudy v.0.9.11: https://github.com/Morisset/pyCloudy/tree/0.9.11.

Description of the models

In all cases, the incident radiation field shape is obtained with BPASS stellar population models (Eldridge et al. 2017), assuming a Salpeter IMF with an upper mass limit of 300 M_sun , stellar metallicity equal to the gas phase metallicity of the surrounding gas cloud, and continuous star-formation history with age of $10^8$ yr. The brightness of the incident radiation field is defined through the ionization parameter log(U) varying between $−4$ and $−1$. Regarding the properties of the gas cloud surrounding the ionizing source (we adopt the spherical shell geometry), we assume a hydrogen number density ranging from $10^2$ to $10^4$ $cm^{−3}$, and a gas-phase metallicity Z_gas from $10%$ solar to two times solar, where the solar abundance of each element is set as in Savage & Sembach (1996). The Cloudy calculation is stopped when reaching a temperature of $500$ K.

Line predictions available

The table joined_table_SF_models.txt in the repository contains the predictions of the line intensity (in units of erg/s, obtained with the command 'get_emis_vol' in pycloudy, and scaled to an $H \beta$ intensity of $100$) as a function of the following model parameters :

---

column name	description
dens	gas density of the cloud (in units of $1/cm^3$ and logarithmic scale)
met	gas-phase metallicity
OH	corresponding oxygen abundance of the cloud (12+log(O/H))
logU	ionization parameter

---

Currently, the flux predictions are available for the following emission lines, in order of increasing wavelength :

column name	emission line
CII_1335	[CII] $1335$ Å
CIV_1551	CIV $1550.78$ Å
HeII_1640	HeII $1640.43$ Å
CIII_1909	CIII] $1909$ Å
Hbeta	$H\beta$
OIII_5007	[OIII] $5006.84$ Å
Halpha	$H\alpha$
NII_6583	[NII] $6583.45$ Å
SIII_9531	[SIII] $9530.62$ Å
CI_9850	[CI] $9850.26$ Å
HeI_10830	HeI $10830$ Å
PaGamma	$Pa\gamma$
PII_1188	[PII] $11882.8$ Å
FeII_1257	[FeII] $12566.8$ Å
PaBeta	$Pa\beta$
FeII_132	[FeII] $13205.5$ Å
FeII_164	[FeII] $16435.5$ Å
PaAlpha	$Pa\alpha$