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

High-redshift Lyman-alpha blobs are extended, luminous, but rare structuresthat appear to be associated with the highest peaks in the matter density ofthe Universe. Their energy output and morphology are similar to powerful radiogalaxies, but the source of the luminosity is unclear. Some blobs areassociated with ultraviolet or infrared bright galaxies, suggesting an extremestarburst event or accretion onto a central black hole. Another possibility isgas that is shock excited by supernovae. However some blobs are not associatedwith galaxies, and may instead be heated by gas falling into a dark matterhalo. The polarization of the Ly-alpha emission can in principle distinguishbetween these options, but a previous attempt to detect this signature returneda null detection. Here we report on the detection of polarized Ly-alpha fromthe blob LAB1. Although the central region shows no measurable polarization,the polarized fraction (P) increases to ~20 per cent at a radius of 45 kpc,forming an almost complete polarized ring. The detection of polarized radiationis inconsistent with the in situ production of Ly-alpha photons, and weconclude that they must have been produced in the galaxies hosted within thenebula, and re-scattered by neutral hydrogen.

Central Powering of the Largest Lyman-alpha Nebula is Revealed by Polarized Radiation