The evolution of H{\sc ii} galaxies: Testing the bursting scenario through the use of self-consistent models

TL;DR

This paper presents self-consistent models combining chemical evolution, stellar population synthesis, and photoionization to simulate HII galaxy spectra, successfully matching various observational data and diagnostic relations.

Contribution

It introduces a comprehensive modeling approach that integrates multiple codes to accurately reproduce HII galaxy spectra and their observed properties.

Findings

Models reproduce observed diagnostic diagrams.

Models match observed abundance and metallicity relations.

Spectral energy distributions align with photometric and spectroscopic data.

Abstract

We have computed a series of realistic and self-consistent models of the emitted spectra of H{\sc ii} galaxies. Our models combine different codes of chemical evolution, evolutionary population synthesis and photoionization. The emitted spectrum of H{\sc ii} galaxies is reproduced by means of the photoionization code CLOUDY, using as ionizing spectrum the spectral energy distribution of the modelled H{\sc ii} galaxy, which in turn is calculated according to a Star Formation History (SFH) and a metallicity evolution given by a chemical evolution model that follows the abundances of 15 different elements. The contribution of emission lines to the broad-band colours is explicitly taken into account. The results of our code are compared with photometric and spectroscopic data of H{\sc ii} galaxies. Our technique reproduces observed diagnostic diagrams, abundances, equivalent width-colour and equivalent width-metallicity relations for local H{\sc ii} galaxies.