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- W3204953764 abstract "The distribution of stellar metallicities within and across galaxies is an excellent relic of the chemical evolution across cosmic time. We present a detailed analysis of spatially resolved stellar populations based on $>2.6$ million spatial bins from 7439 nearby galaxies in the SDSS-IV MaNGA survey. To account for accurate inclination corrections, we derive an equation for morphology dependent determination of galaxy inclinations. Our study goes beyond the well-known global mass-metallicity relation and radial metallicity gradients by providing a statistically sound exploration of local relations between stellar metallicity $[Z/H]$, stellar surface mass density $Sigma_star$ and galactocentric distance in the global mass-morphology plane. We find a significant resolved mass density-metallicity relation $rm rSigma_star ZR$ for galaxies of all types and masses above $10^{9.8},mathrm{M_odot}$. Different radial distances make an important contribution to the spread of the relation. Particularly, in low and intermediate mass galaxies, we find that at fixed $Sigma_star$ metallicity increases with radius independently of morphology. For high masses, this radial dependence is only observed in high $Sigma_star$ regions of spiral galaxies. This result calls for a driver of metallicity, in addition to $Sigma_star$ that promotes chemical enrichment in the outer parts of galaxies more strongly than in the inner parts. We discuss gas accretion, outflows, recycling and radial migration as possible scenarios." @default.
- W3204953764 created "2021-10-11" @default.
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- W3204953764 date "2021-10-09" @default.
- W3204953764 modified "2023-10-15" @default.
- W3204953764 title "SDSS-IV MaNGA: drivers of stellar metallicity in nearby galaxies" @default.
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