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

Media type: E-Article
Title: The OTELO Survey: The Star Formation Rate Evolution of Low-mass Galaxies
Contributor: 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.
imprint: American Astronomical Society, 2021
Published in: The Astrophysical Journal Letters
Language: Not determined
DOI: 10.3847/2041-8213/ac0a7e
ISSN: 2041-8205; 2041-8213
Keywords: Space and Planetary Science ; Astronomy and Astrophysics
Origination:
Footnote:
Description: <jats:title>Abstract</jats:title> <jats:p>We present the analysis of a sample of H<jats:italic>α</jats:italic>, H<jats:italic>β</jats:italic>, and [O <jats:sc>ii</jats:sc>] emission line galaxies from the OTELO survey, with masses typically below <jats:inline-formula> <jats:tex-math> <?CDATA $\mathrm{log}({M}_{* }/{M}_{\odot })\sim 9.4$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>*</mml:mo> </mml:mrow> </mml:msub> <mml:mrow> <mml:mo stretchy="true">/</mml:mo> </mml:mrow> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>⊙</mml:mo> </mml:mrow> </mml:msub> <mml:mo stretchy="false">)</mml:mo> <mml:mo>∼</mml:mo> <mml:mn>9.4</mml:mn> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjlac0a7eieqn1.gif" xlink:type="simple" /> </jats:inline-formula> and redshifts between <jats:italic>z</jats:italic> ∼ 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 <jats:italic>z</jats:italic> ∼ 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 < <jats:italic>z</jats:italic> < 1.43.</jats:p>
Access State: Open Access

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