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

DOI: 
10.3847/2041-8213/ac0a7e
Publication date: 
24/07/2021
Main author: 
Cedrés, Bernabé
IAA authors: 
Alfaro, Emilio J.
Authors: 
Cedrés, Bernabé;Pérez-García, Ana María;Pérez-Martínez, Ricardo;Cerviño, Miguel;Gallego, Jesús;Bongiovanni, Ángel;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.;Ignacio González-Serrano, J.;Padilla Torres, Carmen P.
Journal: 
The Astrophysical Journal
Publication type: 
Article
Volume: 
915
Pages: 
L17
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.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2021ApJ...915L..17C/abstract
ADS Bibcode: 
2021ApJ...915L..17C
Keywords: 
Luminosity function;Observational cosmology;Star formation;Starburst galaxies;Surveys;942;1146;1569;1570;1671;Astrophysics - Astrophysics of Galaxies