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Title: The OTELO Survey: The Star Formation Rate Evolution of Low-mass Galaxies
Authors: Cedrés, B.
Pérez García, A. M.
Pérez Martínez, R.
Cerviño, M.
Gallego, J.
Bongiovanni, Á.
Cepa, J.
Navarro Martínez, R.
Nadolny, J.
Lara López, M. A.
Keywords: Luminosity function;Observational cosmology;Star formation;Starburst galaxies;Surveys
Issue Date: 1-Jul-2021
Publisher: IOP Science Publishing
DOI: 10.3847/2041-8213/ac0a7e
Published version:
Citation: The Astrophysical Journal Letters 915(1): L17(2021)
Abstract: We present the analysis of a sample of Hα, Hβ, and [O ii] emission line galaxies from the OTELO survey, with masses typically below $\mathrm{log}({M}_{* }/{M}_{\odot })\sim 9.4$ and redshifts between z ∼ 0.4 and 1.43. We study the star formation rate, star formation rate density, and their number density and evolution with redshift. We obtain a robust estimate of the specific star formation rate—stellar mass relation based on the lowest-mass sample published so far. We also determine a flat trend of the star formation rate density (SFRD) and number density with redshift. Our results suggest a scenario of no evolution of the number density of galaxies, regardless of their masses, up to redshift z ∼ 1.4. This implies a gradual change of the relative importance of the star-forming processes, from high-mass galaxies to low-mass galaxies, with decreasing redshift. We also find little or no variation of the SFRD in the redshift range of 0.4 < z < 1.43.
E-ISSN: 1538-4357
ISSN: 0004-637X
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