The OTELO survey: the Star Formation Rate Evolution of Low-mass Galaxies

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URI: http://hdl.handle.net/10902/25149
ISSN: 2041-8205
ISSN: 2041-8213
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Autoría
Cedrés, Bernabé; Pérez-Garciá, Ana Mariá; Pérez-Martínez, Ricardo; Cervino, Miguel; Gallego, Jesús; Bongiovanni, Angel; Cepa, Jordi; Navarro Martínez, Rocío; Nadolny, Jakub; Lara-López, Maritza A.; Sánchez-Portal, Miguel; Alfaro, Emilio J.; De Diego, José A.; González-Otero, Mauro; Jesús González J.; González Serrano, José IgnacioAutoridad Unican; Padilla Torres, Carmen P.
Fecha
2021-07
Derechos
© IOP Publishing
Publicado en
Astrophysical Journal Letters, 2021, 915, L17
Editorial
Institute of Physics Publishing
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Palabras clave
Luminosity function
Observational cosmology
Star formation
Starburst galaxies
Surveys
Resumen/Abstract
We present the analysis of a sample of H [alfa], H[beta], and [O ii] emission line galaxies from the OTELO survey, with masses typically below 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
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