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

Context: Compact groups of galaxies are entities that have high densities ofgalaxies and serve as laboratories to study galaxy interactions, intergalacticstar formation and galaxy evolution.  Aims: The main goal of this study is to search for young objects in theintragroup medium of seven compact groups of galaxies: HCG 2, 7, 22, 23, 92,100 and NGC 92 as well as to evaluate the stage of interaction of each group.  Methods: We used Fabry-Perot velocity fields and rotation curves togetherwith GALEX NUV and FUV images and optical R-band and HI maps.  Results: (i) HCG 7 and HCG 23 are in early stages of interaction, (ii) HCG 2and HCG 22 are mildly interacting, and (iii) HCG 92, HCG 100 and NGC 92 are inlate stages of evolution. We find that all three evolved groups containpopulations of young blue objects in the intragroup medium, consistent withages < 100 Myr, of which several are younger than < 10 Myr. We also report thediscovery of a tidal dwarf galaxy candidate in the tail of NGC 92. These threegroups, besides containing galaxies that have peculiar velocity fields, alsoshow extended HI tails.  Conclusions: Our results indicate that the advanced stage of evolution of agroup, together with the presence of intragroup HI clouds, may lead to starformation in the intragroup medium. A table containing all intergalactic HIIregions and tidal dwarf galaxies confirmed to date is appended.

Star formation in the intragroup medium and other diagnostics of the evolutionary stages of compact groups of galaxies