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

Using a systematic broad-band search technique, we have carried out a surveyfor large Lya nebulae (or Lya "blobs") at 2<z<3 within 8.5 square degrees ofthe NOAO Deep Wide-Field Survey (NDWFS) Bootes field, corresponding to a totalsurvey comoving volume of ~10^8 h_70^-3 Mpc^3. Here, we present ourspectroscopic observations of candidate giant Lya nebulae. Of 26 candidatestargeted, 5 were confirmed to have Lya emission at 1.7<z<2.7, four of whichwere new discoveries. The confirmed Lya nebulae span a range of Lya equivalentwidths, colors, sizes, and line ratios, and most show spatially-extendedcontinuum emission. The remaining candidates did not reveal any strong emissionlines, but instead exhibit featureless, diffuse, blue continuum spectra. Theirnature remains mysterious, but we speculate that some of these might be Lyanebulae lying within the redshift desert (i.e., 1.2<z<1.6). Our spectroscopicfollow-up confirms the power of using deep broad-band imaging to search for thebright end of the Lya nebula population across enormous comoving volumes.

A Successful Broad-band Survey for Giant Lya Nebulae II: Spectroscopic Confirmation