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

The Phoenix Deep Survey is a multi-wavelength survey based on deep 1.4 GHzradio imaging, reaching well into the sub-100 microJy level. One of the aims ofthis survey is to characterize the sub-mJy radio population, exploring itsnature and evolution. In this paper we present the catalog and results of thespectroscopic observations aimed at characterizing the optically ``bright''(R<~ 21.5 mag) counterparts of faint radio sources. Out of 371 sources withredshift determination, 21% have absorption lines only, 11% show AGNsignatures, 32% are star-forming galaxies, 34% show narrow emission lines thatdo not allow detailed spectral classification (due to poor signal-to-noiseratio and/or lack of diagnostic emission lines) and the remaining 2% areidentified with stars. For the star-forming galaxies with a Balmer decrementmeasurement we find a median extinction of A(Ha)=1.9 mag, higher than that ofoptically selected samples. This is a result of the radio selection, which isnot biased against dusty systems. Using the available spectroscopicinformation, we estimate the radio luminosity function of star-forming galaxiesin two independent redshift bins at z~0.1 and 0.3 respectively. We find directevidence for strong luminosity evolution of these systems consistent with L(1.4GHz) ~ (1+z)^(2.7).

The Phoenix Deep Survey: Spectroscopic Catalog