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 present a comprehensive theoretical study, using a semi-analytical modelwithin the standard LCDM framework, of the photometric properties of theprogenitors of present-day early-type galaxies in the redshift range 0<z<1. Weexplore progenitors of all morphologies and study their characteristics as afunction of the luminosity and local environment of the early-type remnant atz=0. In agreement with previous studies, we find that, while larger early-typesare generally assembled later, their luminosity-weighted stellar ages aretypically older. In dense cluster-like environments, 70% of early-type systemsare `in place' by z=1 and evolve without interactions thereafter, while in thefield the corresponding value is 30%. Averaging across all environments at z~1,less than 50% of the stellar mass which ends up in early-types today isactually in early-type progenitors at this redshift, in agreement with recentobservational work. We develop probabilistic prescriptions which provide ameans of including spiral (i.e. non early-type) progenitors at intermediate andhigh redshifts, based on their luminosity and optical colours. For example, wefind that, at intermediate redshifts (z~0.5), large (M_V<-21.5), red (B-V>0.7)spirals have 75-95% chance of being an early-type progenitor, while thecorresponding probability for large blue spirals (M_B<-21.5, B-V<0.7) is50-75%. The prescriptions developed here can be used to address, from theperspective of the standard model, the issue of `progenitor bias', whereby theexclusion of late-type progenitors in observational studies can lead toinaccurate conclusions regarding the evolution of the early-type populationover cosmic time. (abridged)

Identifying the progenitor set of present-day early-type galaxies: a view from the standard model