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

Vilella-Rojo, G. and Logroño-García, R. and López-Sanjuan, C. and Viironen, K. and Varela, J. and Moles, M. and Cenarro, A. J. and Cristóbal-Hornillos, D. and Ederoclite, A. and Hernández-Monteagudo, C. and Marín-Franch, A. and Ramió, H. Vázquez and Galbany, L. and Delgado, R. M. González and Hernán-Caballero, A. and Lumbreras-Calle, A. and Sánchez-Blázquez, P. and Sobral, D. and Vílchez, J. M. and Alcaniz, J. and Angulo, R. E. and Dupke, R. A. and Jr, L. Sodré (2021) J-PLUS : The star formation main sequence and rate density at d <75 Mpc. Astronomy and Astrophysics, 650: A68. ISSN 1432-0746

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Abstract

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.