The main sequence of star-forming galaxies - II. A non-evolving slope at the high-mass end - Archive ouverte HAL Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2019

The main sequence of star-forming galaxies - II. A non-evolving slope at the high-mass end

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P. Popesso
  • Function : Author
L. Morselli
  • Function : Author
A. Concas
  • Function : Author
C. Schreiber
  • Function : Author
G. Rodighiero
  • Function : Author
G. Cresci
  • Function : Author
S. Belli
  • Function : Author
G. Erfanianfar
  • Function : Author
C. Mancini
  • Function : Author
M. Dickinson
M. Pannella
D. Elbaz
  • Function : Author

Abstract

By using the deepest available mid- and far-infrared surveys in the CANDELS, GOODS, and COSMOS fields we study the evolution of the main sequence (MS) of star-forming galaxies (SFGs) from z ∼ 0 to ∼ 2.5 at stellar masses larger than 1010 M. The MS slope and scatter are consistent with a rescaled version of the local relation and distribution, shifted at higher values of star formation rate (SFR) according to ∝ (1 + z)3.2. The relation exhibits a bending at the high-mass end and a slightly increasing scatter as a function of the stellar mass. We show that the previously reported evolution of the MS slope, in the considered mass and redshift range, is due to a selection effect. The distribution of galaxies in the MS region at fixed stellar mass is well represented by a single lognormal distribution at all redshifts and masses, with starburst galaxies occupying the tail at high SFR.

Dates and versions

insu-03666699 , version 1 (12-05-2022)

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Cite

P. Popesso, L. Morselli, A. Concas, C. Schreiber, G. Rodighiero, et al.. The main sequence of star-forming galaxies - II. A non-evolving slope at the high-mass end. Monthly Notices of the Royal Astronomical Society, 2019, 490, pp.5285-5299. ⟨10.1093/mnras/stz2635⟩. ⟨insu-03666699⟩
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