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

Bibcode
2021ApJ...915L..17C
DOI
10.3847/2041-8213/ac0a7e
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.
Bibliographical reference

The Astrophysical Journal

Advertised on:
7
2021
Journal
The Astrophysical Journal
Number of authors
17
IAC number of authors
4
Citations
0
Refereed citations
0
Description
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.
Related projects
Project Image
Evolution of Galaxies

Galaxy evolution is a crucial topic in modern extragalactic astrophysics, linking cosmology to the Local Universe. Their study requires collecting statistically significant samples of galaxies of different luminosities at different distances. It implies the ability to observe faint objects using different techniques, and at different wavelengths

Jorge
Cepa Nogue
In progress
Type
Refereed
Luminosity function
Observational cosmology
Star formation
Starburst galaxies
Surveys
Formation & Evolution of Galaxies (FYEG)

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