Probing the Star Formation Main Sequence down to \(10^{8}\) M\(_\odot\) at \(1.0<z<3.0\)

We investigate the star formation main sequence (MS) (SFR-M\(_{\star}\)) down to 10\(^{8-9}\mathrm{M}_\odot\) using a sample of 34,061 newly-discovered ultra-faint (\(27\lesssim i \lesssim 30\) mag) galaxies at \(1

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Published in:arXiv.org 2023-03
Main Authors: Mérida, Rosa M, Pérez-González, Pablo G, Sánchez-Blázquez, Patricia, García-Argumánez, Ángela, Annunziatella, Marianna, Costantin, Luca, Lumbreras-Calle, Alejandro, Alcalde-Pampliega, Belén, Barro, Guillermo, Espino-Briones, Néstor, Koekemoer, Anton M
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Star & galaxy formation
Star formation
Starburst galaxies
Stellar populations
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creator Mérida, Rosa M
Pérez-González, Pablo G
Sánchez-Blázquez, Patricia
García-Argumánez, Ángela
Annunziatella, Marianna
Costantin, Luca
Lumbreras-Calle, Alejandro
Alcalde-Pampliega, Belén
Barro, Guillermo
Espino-Briones, Néstor
Koekemoer, Anton M
description We investigate the star formation main sequence (MS) (SFR-M\(_{\star}\)) down to 10\(^{8-9}\mathrm{M}_\odot\) using a sample of 34,061 newly-discovered ultra-faint (\(27\lesssim i \lesssim 30\) mag) galaxies at \(1
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Virtually these galaxies are not contained in previous public catalogs, effectively doubling the number of known sources in the field. The sample was constructed by stacking the optical broad-band observations taken by the HST/GOODS-CANDELS surveys as well as the 25 ultra-deep medium-band images gathered by the GTC/SHARDS project. Our sources are faint (average observed magnitudes \(\sim28.2\) mag, \(\sim27.9\) mag), blue (UV-slope \(<\beta>\sim-1.9\)), star-forming (rest-frame colors \(\sim0.10\) mag, \(\sim0.17\) mag) galaxies. These observational characteristics are identified with young (mass-weighted age \(<\mathrm{t_{M-w}}>\sim0.014\) Gyr) stellar populations subject to low attenuations (\(<\mathrm{A(V)}>\sim0.30\) mag). Our sample allows us to probe the MS down to \(10^{8.0}\,\mathrm{M}_\odot\) at \(z=1\) and \(10^{8.5}\,\mathrm{M}_\odot\) at \(z=3\), around 0.6 dex deeper than previous analysis. 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subjects Star & galaxy formation
Star formation
Starburst galaxies
Stellar populations
title Probing the Star Formation Main Sequence down to \(10^{8}\) M\(_\odot\) at \(1.0<z<3.0\)
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