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

Ly-alpha blobs (LABs) offer insight into the complex interface betweengalaxies and their circumgalactic medium. Whilst some LABs have been found tocontain luminous star-forming galaxies and active galactic nuclei that couldpotentially power the Ly-alpha emission, others appear not to be associatedwith obvious luminous galaxy counterparts. It has been speculated that LABs maybe powered by cold gas streaming on to a central galaxy, providing anopportunity to directly observe the `cold accretion' mode of galaxy growth.Star-forming galaxies in LABs could be dust obscured and therefore detectableonly at longer wavelengths. We stack deep SCUBA-2 observations of the SSA22field to determine the average 850um flux density of 34 LABs. We measure S_850= 0.6 +/- 0.2mJy for all LABs, but stacking the LABs by size indicates thatonly the largest third (area > 1794 kpc^2) have a mean detection, at 4.5 sigma,with S_850 = 1.4 +/- 0.3mJy. Only two LABs (1 and 18) have individual SCUBA-2 >3.5 sigma detections at a depth of 1.1mJy/beam. We consider two possiblemechanisms for powering the LABs and find that central star formation is likelyto dominate the emission of Ly-alpha, with cold accretion playing a secondaryrole.

The average submillimetre properties of Lyman-alpha Blobs at z=3