Abstract
We study the evolution of the star formation rate (SFR) - stellar mass
(M⋆) relation and specific star formation rate (sSFR) of
star-forming galaxies (SFGs) since a redshift z ≃ 5.5 using 2435
(4531) galaxies with highly reliable spectroscopic redshifts in the
VIMOS Ultra-Deep Survey (VUDS). It is the first time that these
relations can be followed over such a large redshift range from a single
homogeneously selected sample of galaxies with spectroscopic redshifts.
The log (SFR) - log (M⋆) relation for SFGs remains
roughly linear all the way up to z = 5, but the SFR steadily increases
at fixed mass with increasing redshift. We find that for stellar masses
M⋆ ≥ 3.2 × 109M⊙ the
SFR increases by a factor of ~13 between z = 0.4 and z = 2.3. Weextend
this relation up to z = 5, finding an additional increase in SFR by a
factor of 1.7 from z = 2.3 to z = 4.8 for masses M⋆ ≥
1010M⊙. We observe a turn-off in the
SFR-M⋆ relation at the highest mass end up to a redshift
z ~ 3.5. We interpret this turn-off as the signature of a strong
on-going quenching mechanism and rapid mass growth. The sSFR increases
strongly up to z ~ 2, but it grows much less rapidly in 2
Original language | English |
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Article number | A54 |
Number of pages | 9 |
Journal | Astronomy & Astrophysics |
Volume | 581 |
DOIs | |
Publication status | Published - 1 Sept 2015 |
Keywords / Materials (for Non-textual outputs)
- galaxies: evolution
- galaxies: star formation
- galaxies: formation
- galaxies: high-redshift