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  • 2101.04062v1

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J-PLUS: The star formation main sequence and rate density at d <75 Mpc

Research output: Contribution to journalJournal articlepeer-review

  • G. Vilella-Rojo
  • R. Logroño-García
  • C. López-Sanjuan
  • K. Viironen
  • J. Varela
  • M. Moles
  • A. J. Cenarro
  • D. Cristóbal-Hornillos
  • A. Ederoclite
  • C. Hernández-Monteagudo
  • A. Marín-Franch
  • H. Vázquez Ramió
  • L. Galbany
  • R. M. González Delgado
  • A. Hernán-Caballero
  • A. Lumbreras-Calle
  • P. Sánchez-Blázquez
  • J. M. Vílchez
  • J. Alcaniz
  • R. E. Angulo
  • R. A. Dupke
  • L. Sodré Jr
<mark>Journal publication date</mark>7/01/2021
<mark>Journal</mark>Astronomy and Astrophysics
Publication StatusAccepted/In press
<mark>Original language</mark>English


Our goal is to estimate the star formation main sequence (SFMS) and the star formation rate density (SFRD) at z 8 and it is clearly defined by the blue galaxies, with the red galaxies located below them. The SFMS is described as log SFR = 0.83 log M - 8.44. We find a good agreement with previous estimations of the SFMS, especially those based on integral field spectroscopy. The Halpha luminosity function of the AGN-free sample is well described by a Schechter function with log L* = 41.34, log phi* = -2.43, and alpha = -1.25. Our measurements provide a lower characteristic luminosity than several previous studies in the literature. The derived star formation rate density at d <75 Mpc is log rho_SFR = -2.10 +- 0.11, with red galaxies accounting for 15% of the SFRD. Our value is lower than previous estimations at similar redshift, and provides a local reference for evolutionary studies regarding the star formation history of the Universe.