Construction of spectral libraries of star-forming galaxies at $0.3\leq z \leq 2.5$

TL;DR

This paper develops a methodology to construct realistic spectral libraries of star-forming galaxies at redshifts 0.3 to 2.5, aiding the Euclid mission's spectroscopic analysis capabilities.

Contribution

It introduces a new approach for building synthetic galaxy spectral energy distributions with accurate emission lines, tailored for Euclid's spectroscopic simulations.

Findings

Created a comprehensive spectral library for star-forming galaxies

Incorporated reliable emission line fluxes and widths

Enhanced the realism of galaxy SED models for survey simulations

Abstract

Spectral energy distribution (SED) models of galaxies at $0.3\leq z \leq 2.5$ were constructed to be processed by the Euclid spectroscopic channel simulator in order to investigate the \Euclid Near-Infrared Spectrometer and Photometer (NISP) capabilities. We developed a solid methodology to build a realistic and representative synthetic SED library of star-forming galaxies, including reliable emission line fluxes and widths. The construction of the SEDs consists in computing the continuum using the Bruzual \& Charlot (2003) models, calling out SED fitting parameters available in publicly released multi-wavelength catalogues. Emission lines were added using empirical and theoretical relations.