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

Global VLBI observations at 5 GHz have been performed to study the sourcemorphology in 10 compact steep-spectrum (CSS) sources selected from the Peacock& Wall catalogue with the aim of finding asymmetric structures produced by theinteraction with the ambient medium. The combination of these data and earlier1.7-GHz observations allows the study of the spectral index distribution acrossthe source structure and the unambiguous determination of the nature of eachcomponent. In seven sources we detected the core component with a flat orinverted spectrum. In six sources the radio emission has a two-sided morphologyand comes mainly from steep-spectrum extended structures, like lobes, jets, andhotspots. Only one source, 0319+121, has a one-sided core-jet structure. Inthree out of the six sources with a two-sided structure the flux densityarising from the lobes is asymmetric, and the brightest lobe is the one closestto the core, suggesting that the jets are expanding in an inhomogeneous ambientmedium which may influence the source growth. The interaction between the jetand the environment may slow down the source expansion and enhance theluminosity due to severe radiative losses, likely producing an excess of CSSradio sources in flux density limited samples. The lobes of the other threeasymmetric sources have a brighter-when-farther behaviour, in agreement withwhat is expected by projection and relativistic effects. Simultaneous VLAobservations carried out to investigate the polarization properties of thetargets detected significant polarized emission (~5.5%) only from the quasar0319+121.

A sample of small size compact steep-spectrum radio sources. VLBI images and VLA polarization at 5 GHz