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

Cold dark matter model predicts that the large-scale structure growshierarchically. Small dark matter halos form first. Then, they grow graduallyvia continuous merger and accretion. These halos host the majority of baryonicmatter in the Universe in the form of hot gas and cold stellar phase.Determining how baryons are partitioned into these phases requires detailedmodeling of galaxy formation and their assembly history. It is speculated thatformation time of the same mass halos might be correlated with their baryoniccontent. To evaluate this hypothesis, we employ halos of mass above$10^{14}\,M_{\odot}$ realized by TNG300 solution of the IllustrisTNG project.Formation time is not directly observable. Hence, we rely on the magnitude gapbetween the brightest and the fourth brightest halo galaxy member, which isshown that traces formation time of the host halo. We compute the conditionalstatistics of the stellar and gas content of halos conditioned on their totalmass and magnitude gap. We find a strong correlation between magnitude gap andgas mass, BCG stellar mass, and satellite galaxies stellar mass, but not thetotal stellar mass of halo. Conditioning on the magnitude gap can reduce thescatter about halo property--halo mass relation and has a significant impact onthe conditional covariance. Reduction in the scatter can be as significant as30%, which implies more accurate halo mass prediction. Incorporating themagnitude gap has a potential to improve cosmological constraints using haloabundance and allows us to gain insight into the baryon evolution within thesesystems.

Aging Halos: Implications of the Magnitude Gap on Conditional Statistics of Stellar and Gas Properties of Massive Halos