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

We study the star formation history for a sample of 154 galaxies with stellarmass $10^{10}\lesssim M_{\ast}\lesssim 10^{12} M_{\odot}$ in the redshift range$0.7 < z < 0.9$. We do this using stellar population models combined withfull-spectrum fitting of good quality spectra and high resolution photometry.For a subset of 68 galaxies ($M_{\ast}\gtrsim 10^{11} M_{\odot}$) weadditionally construct dynamical models. These use an axisymmetric solution tothe Jeans equations, which allows for velocity anisotropy, and adopts resultsfrom abundance matching techniques to account for the dark matter content.  We find that: (i) The trends in star formation history observed in the localuniverse are already in place by $z\sim1$: the most massive galaxies arealready passive, while lower mass ones have a more extended star formationhistories, and the lowest mass galaxies are actively forming stars; (ii) weplace an upper limit of a factor 1.5 to the size growth of the massive galaxypopulation; (iii) we present strong evidence for low dark matter fractionswithin $1R_{\rm e}$ (median of 9 per cent and 90th percentile of 21 per cent)for galaxies with $M_{\ast} \gtrsim 10^{11} M_{\odot}$ at these redshifts; and(iv) we confirm that these galaxies have, on average, a Salpeter normalisationof the stellar initial mass function.

Observed trend in the star formation history and the dark matter fraction of galaxies at redshift $z\approx0.8$