Artemi Camps Fariña
Gather.town id
CCE05
Poster Title
Evolution of the Chemical Enrichment and Mass Metallicity Relation for local galaxies
Institution
Instituto de Astronomia, Universidad Nacional Autonoma de Mexico
Abstract (short summary)
We present the results of a fossil record technique study using MaNGA and CALIFA galaxies showing the chemical enrichment history (ChEH) as well as how the mass-metallicity relation (MZR) has changed.
In order to analyze how the evolution of these relations correlates with the properties of the galaxy we separate the sample into mass, morphology and star-forming status bins, finding a strong dependence on the mass and the morphology, and dependence on the star-forming status that is more subtle after accounting for the correlation between morphology and star-forming status. We also measure the ChEH and MZR at different galactocentric radii, finding the effects of local downsizing as well as an inversion of the metallicity gradient for low mass galaxies.
In order to analyze how the evolution of these relations correlates with the properties of the galaxy we separate the sample into mass, morphology and star-forming status bins, finding a strong dependence on the mass and the morphology, and dependence on the star-forming status that is more subtle after accounting for the correlation between morphology and star-forming status. We also measure the ChEH and MZR at different galactocentric radii, finding the effects of local downsizing as well as an inversion of the metallicity gradient for low mass galaxies.
Plain text (extended) Summary
We present the results of applying the fossil record techinque to the MaNGA sample which allows us to trace the metallicity of its galaxies over cosmic time and see how the mass-metallicity relation (MZR) evolved. We find that the more massive galaxies became enriched first and the lower mass galaxies did so later, producing a change in the MZR which becomes shallower in time. Separating the sample into morphology we find that the mass dependency of the MZR becomes less relevant for later morphological types, to the extent that it inverts for Sd galaxies, showing how morphology is at least as important a factor as mass in chemical evolution. We also find an inversion in the radial metallicity gradient for low mass galaxies.
Poster file