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 confirm an eighth gravitational lens system in the CAmbridge Sloan Survey Of Wide ARcs in the skY (CASSOWARY) catalogue. Exploratory observations with the X‐shooter spectrograph on the Very Large Telescope of the European Southern Observatory show the system CASSOWARY 5 (CSWA 5) to consist of at least three images of a blue star‐forming galaxy at   z = 1.0686 , lensed by an apparent foreground group of red galaxies, one of which is at   z = 0.3877 . The lensed galaxy exhibits a rich spectrum with broad interstellar absorption lines and a wealth of nebular emission lines. Preliminary analysis of these features shows the galaxy to be young, with an age of ∼25–50 Myr. With a star formation rate of ∼20 M  ⊙  yr  −1 , the galaxy has already assembled a stellar mass   M  * ∼ 3 × 10 9   M  ⊙   and reached half‐solar metallicity. Its blue spectral energy distribution and Balmer line ratios suggest negligible internal dust extinction. A more in‐depth analysis of the properties of this system is currently hampered by the lack of a viable lensing model. However, it is already clear that CSWA 5 shares many of its physical characteristics with the general population of UV‐selected galaxies at redshifts   z = 1–3 , motivating further study of both the source and the foreground mass concentration responsible for the gravitational lensing.

X‐shooter observations of the gravitational lens system CASSOWARY 5 ★