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 Cosmic Dawn Survey Pre-launch (PL) catalogues cover an effective 10.13deg$^{2}$ area with uniform deep Spitzer/IRAC data ($m\sim25$ mag, 5$\sigma$),the largest area covered to these depths in the infrared. These data are usedto gain new insight into the growth of stellar mass across cosmic history bycharacterising the evolution of the galaxy stellar mass function (GSMF) through$0.2 < z \leq 6.5$. The total volume (0.62 Gpc$^{3}$) represents a tenfoldincrease compared to previous works that have explored $z > 3$ andsignificantly reduces cosmic variance, yielding strong constraints on theabundance of massive galaxies. Results are generally consistent with theliterature but now provide firm estimates of number density where only upperlimits were previously available. Contrasting the GSMF with the dark matterhalo mass function suggests that massive galaxies ($M \gtrsim10^{11}$M$_{\odot}$) at $z > 3.5$ required integrated star-formation efficiencies of$M/(M_{\rm h}f_{\rm b}) \gtrsim$ 0.25--0.5, in excess of the commonly-held viewof ``universal peak efficiency" from studies on the stellar-to-halo massrelation (SHMR). Such increased efficiencies imply an evolving peak in the SHMRat $z > 3.5$ which can be maintained if feedback mechanisms from activegalactic nuclei and stellar processes are ineffective at early times. Inaddition, a significant fraction of the most massive quiescent galaxies areobserved to be in place already by $z\sim 2.5$--3. The apparent lack in changeof their number density by $z\sim 0.2$ is consistent with relatively littlemass growth from mergers. Utilising the unique volume, evidence for anenvironmental dependence of the galaxy stellar mass function is found all theway through $z\sim 3.5$ for the first time, though a more carefulcharacterisation of the density field is ultimately required for confirmation.

Euclid preparation: TBD. Cosmic Dawn Survey: evolution of the galaxy stellar mass function across 0.2