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

Galaxy proto-clusters at z >~ 2 provide a direct probe of the rapid massassembly and galaxy growth of present day massive clusters. Because of the needof precise galaxy redshifts for density mapping and the prevalence of starformation before quenching, nearly all the proto-clusters known to date wereconfirmed by spectroscopy of galaxies with strong emission lines. Therefore,large emission-line galaxy surveys provide an efficient way to identifyproto-clusters directly. Here we report the discovery of a large-scalestructure at z = 2.44 in the HETDEX Pilot Survey. On a scale of a few tens ofMpc comoving, this structure shows a complex overdensity of Lya emitters (LAE),which coincides with broad-band selected galaxies in the COSMOS/UltraVISTAphotometric and zCOSMOS spectroscopic catalogs, as well as overdensities ofintergalactic gas revealed in the Lya absorption maps of Lee et al. (2014). Weconstruct mock LAE catalogs to predict the cosmic evolution of this structure.We find that such an overdensity should have already broken away from theHubble flow, and part of the structure will collapse to form a galaxy clusterwith 10^14.5 +- 0.4 M_sun by z = 0. The structure contains a higher medianstellar mass of broad-band selected galaxies, a boost of extended Lya nebulae,and a marginal excess of active galactic nuclei relative to the field,supporting a scenario of accelerated galaxy evolution in cluster progenitors.Based on the correlation between galaxy overdensity and the z = 0 descendanthalo mass calibrated in the simulation, we predict that several hundred 1.9 < z< 3.5 proto-clusters with z = 0 mass of > 10^14.5 M_sun will be discovered inthe 8.5 Gpc^3 of space surveyed by the Hobby Eberly Telescope Dark EnergyExperiment.

Surveying Galaxy Proto-clusters in Emission: A Large-scale Structure at z=2.44 and the Outlook for HETDEX