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

The most massive and luminous galaxies in the Universe serve as powerfulprobes to study the formation of structure, the assembly of mass, andcosmology. However, their detailed formation and evolution is still barelyunderstood. Here we extract a sample of massive mock galaxies from thesemi-analytical model of galaxy formation (SAM) GALACTICUS from theMultiDark-Galaxies, by replicating the CMASS photometric selection from theSDSS-III Baryon Oscillation Spectroscopic Survey (BOSS). The comparison of theGALACTICUS CMASS-mock with BOSS-CMASS data allows us to explore differentaspects of the massive galaxy population at $0.5<z<0.6$, including thegalaxy-halo connection and the galaxy clustering. We find good agreementbetween our modelled galaxies and observations regarding the galaxy-haloconnection, but our CMASS-mock over-estimates the clustering amplitude of the2-point correlation function, due to a smaller number density compared to BOSS,a lack of blue objects, and a small intrinsic scatter in stellar mass at fixedhalo mass of $<0.1$ dex. To alleviate this problem, we construct an alternativemock catalogue mimicking the CMASS colour-magnitude distribution by randomlydown-sampling the SAM catalogue. This CMASS-mock reproduces the clustering ofCMASS galaxies within 1$\sigma$ and shows some environmental dependency of starformation properties that could be connected to the quenching of star formationand the assembly bias.

A semi-analytical perspective on massive galaxies at $z\sim0.55$