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 present direct imaging data of 22 ultra steep spectrum radio sourcesobtained at (or near) a subarcsecond seeing. The basic sample of 40 doubleradio sources was selected from the RATAN-600 catalogue. The FRII-structure hasbeen confirmed with VLA and preliminary optical identifications which come fromthe 6 m-telescope. As the RATAN-600 flux limit at 3.9 GHz ($\approx$ 10mJy) isfainter than that of major surveys, the sample may have high-$z$ contents. Thisis also suggested by the faint magnitudes in the Hubble diagram. The final aimis to create a homogeneous sample of high-$z$ radio galaxies in a well definedstrip around the sky, with faint radio limit and subarcsecond morphology downto $m_{R}=24$.  We could confirm 16 identifications down to $m_{R}\sim$24. Most of theextended objects have multicomponent structures as expected from other surveysof high-redshift radio galaxies. We found five unresolved objects even with asubarcsecond seeing. Of the remaining six objects, three are extremely faintand the other three have such a complex environment that further observationsare needed to confirm the optical identification.Comment: A&AS in pres

Optical morphology of distant RATAN-600 radio galaxies from subarcsecond resolution NOT images