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 report the discovery of a strong over-density of galaxies in the field ofa radio galaxy at z=1.52 (4C65.22) based on our broad-band and narrow-band(H-alpha) photometry with Subaru Telescope. We find that H-alpha emitters arelocated in the outskirts of the density peak (cluster core) dominated bypassive red-sequence galaxies. This resembles the situation in lower-redshiftclusters, suggesting that the newly discovered structure is a well-evolved richgalaxy cluster at z=1.5. Our data suggest that the color-density and stellarmass-density relations are already in place at z~1.5, mostly driven by thepassive red massive galaxies residing within Rc<200 kpc from the cluster core.These environmental trends almost disappear when we consider only star-forming(SF) galaxies. We do not find SFR-density or SSFR-density relations amongst SFgalaxies, and the location of the SF main sequence does not significantlychange with environment. Nevertheless, we find a tentative hint thatstar-bursting galaxies (up-scattered objects from the main sequence) arepreferentially located in a small group at ~1-Mpc away from the main body ofthe cluster. We also argue that the scatter of the SF main sequence could bedependent on the distance to the nearest neighboring galaxy.

The environmental impacts on the star formation main sequence: an H-alpha study of the newly discovered rich cluster at z=1.52