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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We use JWST NIRCam observations of the massive lensing cluster field A2744 todevelop a red galaxy selection of f(F444W) > 1 uJy and f(F444W)/f(F150W) > 3.5that picks out all 9 >4.5-sigma ALMA 1.1 or 1.2 mm sources and 17 of the 19>5-sigma SCUBA-2 850 micron sources in the covered areas. We show that by usingthe red galaxies as priors, we can probe deeper in the SCUBA-2 850 micronimage. This gives a sample of 44 >3-sigma SCUBA-2 850 micron sources withaccurate positions, photometric redshifts, and magnifications. To investigatewhy our red galaxy selection picks out the 850 micron sources, we next analyzean extended sample of 167 sources with f(F444W) >0.05uJy and f(F444W)/f(F150W)>3.5. We find that the fainter f(F444W) sources in this sample are too faint tobe detected in the SCUBA-2 850 micron image. We also show that there is astrong drop between z<4 and z>4 (a factor of around 5) in the ratio of thefar-infrared luminosity estimated from the 850 micron flux to the nuLnu(5000)at rest-frame 5000A. We argue that this result may be due to the high-redshiftsources having less dust content than the lower redshift sources.

Mapping the Decline with Redshift of Dusty Star-forming Galaxies Using JWST and SCUBA-2