Detalles de publicación

PP 021050

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

Bernabé Cedrés (1,2), Ana María Pérez-García (3,4), Ricardo Pérez Martínez(5,4), Miguel Cerviño (3) et al. Includes Jakub Nadolny (1,2) and Mauro González-Otero (1,2)
(1) IAC, (2) ULL, (3) CSIC/INTA, (4) ASPID, (5) ISDEFE (ESAC)/ESA
We present the analysis of a sample of Ha, Hb and [OII] emission line galaxies from the OTELO survey, with masses typically below $log(M_*/M_\sun) \sim 9.4$ and redshifts between $z \sim 0.4$ and 1.43.
We study the star formation rate, star formation rate density, and number density and their 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 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 $z\sim1.4$. 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 star formation rate density in the redshift range of $0.4<z<1.43$.

 
Aceptado para publicación en ApJL | Enviado el 2021-06-24 | Proyecto P/301113