English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present a study on the radial profiles of D4000,luminosity-weightedstellar ages $\tau_L$,and luminosity-weighted stellar metallicities $[Z/H]_L$of 3654 nearby galaxies($0.01<z<0.15$)using the IFU spectroscopic data from theMaNGA survey available in the SDSS DR15,in an effort to explore the connectionbetween median stellar population radialgradients($\nabla$D4000,$\nabla\tau_L,\nabla[Z/H]_L$)out to~$1.5R_e$ andvarious galaxy properties,including stellar mass($M_\star$),specific starformation rate(sSFR),morphologies,and local environment. We find that $M_\star$is the single most predictive physical property for$\nabla$D4000and$\nabla[Z/H]_L$. The most predictive properties for $\nabla\tau_L$ aresSFR,and to a lesser degree,$M_\star$. The environmental parameters,includinglocal galaxy overdensities and central-satellite division,have virtually nocorrelation with stellar population radial profiles for the whole sample,butthe $\nabla$D4000 of star-forming satellite galaxies with$M_\star\lesssim10^{10}M_\odot$exhibit a significant positive correlation with galaxyoverdensities. Galaxies with lower sSFR have on average steeper negativestellar population gradients,and this sSFR dependence is stronger for moremassive star-forming galaxies. The negative correlation between the medianstellar population gradients and$M_\star$ are best described largely assegmented relationships, whereby median gradients of galaxies with$\logM_\star\lesssim 10$(with the exact value depending on sSFR)have much weakermass dependence than galaxies with higher$M_\star$. While the dependence of theradial gradients of ages and metallicities on T-Types and central stellar masssurface densities are generally not significant,galaxies with later T-Types orlower central mass densities tend to have significantly lowerD4000,younger$\tau_L$ and lower$[Z/H]_L$ across the radial ranges probed inthis study.

The Most Predictive Physical Properties for the Stellar Population Radial Profiles of Nearby Galaxies