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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This work investigates the fundamental mechanism(s) that drive galaxyevolution in the Local Universe. By comparing two proxies of star-formationsensitive to different timescales, such as EW(H$\alpha$) and colours like$g-r$, one may distinguish between smooth secular evolution (ageing) and suddenchanges (quenching) on the recent star formation history of galaxies. Buildingupon the results obtained from a former study based on 80.000 SDSS single-fibremeasurements, we now focus on spatially-resolved (on kpc scales) galaxies,comparing with a sample of 637 nearby objects observed by the CALIFA survey. Ingeneral, galaxies cannot be characterised in terms of a single `evolutionarystage'. Individual regions within galaxies arrange along a relatively narrowageing sequence, with some intrinsic scatter possibly due to their differentevolutionary paths. These sequences, though, differ from one galaxy to another,although they are broadly consistent with the overall distribution found forthe (central) SDSS spectra. We find evidence of recent quenching episodes(relatively blue colours and strong H$\alpha$ absorption) in a small fractionof galaxies (most notably, low-mass ellipticals), on global scales andindividual regions (particularly at high metallicity). However, we argue thatmost of the systems, over their entire extent, are compatible with a secularinside-out scenario, where the evolutionary stage correlates with both global(mass, morphology, and environment) as well as local (surface brightness andmetallicity) properties.

Galaxy evolution on resolved scales: ageing and quenching in CALIFA