Kavli Affiliate: John D. Silverman
| First 5 Authors: Andreas L. Faisst, Andreas L. Faisst, , ,
| Summary:
We present the stellar mass-metallicity relation (MZR) and
mass-metallicity-star formation relation ("fundamental metallicity relation";
FMR) of 18 massive (log(M/M$_odot$) = 9.5-11) main-sequence galaxies at z~5
from the ALPINE-CRISTAL-JWST sample. This sample complements recent studies by
JWST at up to two orders of magnitude lower stellar masses. The metallicities
are derived using strong optical lines, and verified by temperature-based
oxygen abundance measurements for five galaxies for which faint auroral lines
are detected. We find little evolution at the massive end of the MZR between
z~5 and cosmic noon at z~2, suggesting a fast metal enrichment at early times.
The FMR at z=5 exhibits a 5x larger scatter (preferentially to lower
metallicities) compared the local FMR relation. This scatter can be explained
by a bursty star formation and the direct build-up of metals in early galaxies
as well as differences in age and outflow efficiencies. Capitalizing on all
available samples, we find that the observed MZR and FMR over three orders of
stellar mass is generally in good agreement with results from cosmological
simulation, although some underestimate the metal enrichment at low stellar
masses. This may be due to too efficient metal-rich outflows. We show that the
ALPINE-CRISTAL-JWST galaxies likely joined the current FMR at z~10 and will
evolve into massive (log(M/M$_odot$)~11.4) galaxies with super-solar
metallicities by z=0.
| Search Query: ArXiv Query: search_query=au:”John D. Silverman”&id_list=&start=0&max_results=3