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 consider the hypothesis that the formation of elliptical galaxies includesa phase in which star formation is mostly restricted to massive stars, with thebias towards high mass stars increasing with elliptical galaxy mass. The massfraction of stars in this top-heavy mode of star formation is constrained byrequiring the resulting stellar remnants to account for the observed increasein the mass-to-light ratio of ellipticals with increasing galaxy mass. We thenconsider the implications of this population of massive stars for theintracluster medium and the extragalactic background at various wavelengths.The mass and abundance ratios of metals produced by our proposed population ofmassive stars are consistent with the observations of the mass and abundanceratios of metals in the hot gas of galaxy clusters for most of the standardrange of IMF slopes and SN II yields. The predicted energy density produced bythis stellar population approaches current limits on the extragalacticbackground at both optical wavelengths, into which the ultraviolet radiation ofthe massive stars is likely to be redshifted, and far-infared wavelengths, atwhich starlight reprocessed by dust associated with the starburst will beobserved. In either case, the background is predicted to be significantlyclustered since massive ellipticals are clustered.

On the Effects of Bursts of Massive Star Formation during the Evolution of Elliptical Galaxies