2021/06/23 by Bernabé Cedrés, Ana María Pérez-García, Ricardo Pérez-Martínez +14 · 1 citation
Physics and Astronomy · #astro-ph.GA
paper · pdf · doi:10.3847/2041-8213/ac0a7e
8 pages, 3 figures, accepted for publication in ApJ letters
arxiv created 2021/06/23 · arxiv updated 2021/07/07
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) ∼ 9.4 and redshifts between z ∼ 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∼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 star formation rate density in the redshift range of 0.4<z<1.43.