Evolution of spatially resolved star formation main sequence and surface density profiles in massive disc galaxies at 0 ≲ z ≲ 1: Inside-out stellar mass buildup and quenching

Abdurro'uf, Masayuki Akiyama

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We investigate a relation between surface densities of star formation rate (SFR) and stellar mass (M*) at a ~1 kpc scale namely spatially resolved star formation main sequence (SFMS) in massive (log (M*/M⊙) > 10.5) face-on disc galaxies at 0.01 < z < 0.02 and 0.8 < z < 1.8 and examine evolution of the relation. The spatially resolved SFMS of z ~ 0 galaxies is discussed in a companion paper. For z ~ 1 sample, we use eight bands imaging data set from Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey and 3D- HST and perform a pixel-to-pixel spectral energy distribution fitting to derive the spatially resolved SFR and M*. We find a linear spatially resolved SFMS in the z ~ 1 galaxies that lie on the global SFMS, while a 'flattening' at high Σ* end is found in that relation for the galaxies that lie below the global SFMS. Comparison with the spatially resolved SFMS of the z ~ 0 galaxies shows smaller difference in the specific SFR (sSFR) at low Σ* than that at high Σ*. This trend is consistent with the evolution of the sSFR(r) radial profile, which shows a faster decrease in the central region than in the outskirt, agrees with the inside-out quenching scenario.We then derive an empirical model for the evolution of the Σ*(r), ΣSFR(r), and sSFR(r) radial profiles. Based on the empirical model, we estimate the radial profile of the quenching time-scale and reproduce the observed spatially resolved SFMS at z ~ 1 and ~0.

Original languageEnglish
Pages (from-to)5083-5100
Number of pages18
JournalMonthly Notices of the Royal Astronomical Society
Volume479
Issue number4
DOIs
Publication statusPublished - 2018 Oct 1

Keywords

  • Galaxies: evolution
  • Galaxies: formation
  • Galaxies: fundamental parameters
  • Galaxies: spiral
  • Galaxies: star formation
  • Galaxies: structure

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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