The OTELO survey: the star formation rate evolution of low-mass galaxies

We present the analysis of a sample of Hα, H β, and [O II]emission line galaxies from the OTELO survey, with masses typically below log(M*/Mꙩ) ∼ 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 reds...

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Bibliographic Details
Authors: Bernabé, Cedrés, Pérez García, Ana María, Pérez Martínez, Ricardo, Cerviño, Miguel, Gallego Maestro, Jesús, Bongiovanni, Ángel, Cepa, Jordi, Navarro Martínez, Rocío, Nadolny, Jakub, Lara López, Maritza A., Sánchez Portal, Miguel, Alfaro, Emilio J., Diego, José Antonio de, González Otero, Mauro, González, J. Jesús, González Serrano, J. Ignacio, Padilla Torres, Carmen P.
Format: article
Publication Date:2021
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/4439
Online Access:https://hdl.handle.net/20.500.14352/4439
Access Level:Open access
Keyword:52
Formation rate density
Forming galaxies
Luminosisty function
H-alpha
O-II
Stellar mass
Deep
Redshifts
Emitters
Calibrations
Astrofísica
Astronomía (Física)
Description
Summary:We present the analysis of a sample of Hα, H β, and [O II]emission line galaxies from the OTELO survey, with masses typically below log(M*/Mꙩ) ∼ 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.

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