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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We study the scaling relations between the baryonic content and total mass ofgroups of galaxies, as these systems provide a unique way to examine the roleof non-gravitational processes in structure formation. Using Planck and ROSATdata, we conduct detailed comparisons of the stacked thermal Sunyaev-Zel'dovich(tSZ) and X-ray scaling relations of galaxy groups found in the Galaxy And MassAssembly (GAMA) survey and the BAHAMAS hydrodynamical simulation. We use weakgravitational lensing data from the Kilo Degree Survey (KiDS) to determine theaverage halo mass of the studied systems. We analyse the simulation in the sameway, using realistic weak lensing, X-ray, and tSZ synthetic observations.Furthermore, to keep selection biases under control, we employ exactly the samegalaxy selection and group identification procedures to the observations andsimulation. Applying this comparison, we find that the simulations reproducethe richness, size, and stellar mass functions of GAMA groups, as well as thestacked weak lensing and tSZ signals in bins of group stellar mass. However,the simulations predict X-ray luminosities that are higher than observed forthis optically-selected group sample. As the same simulations were previouslyshown to match the luminosities of X-ray-selected groups, this suggests thatX-ray-selected systems may form a biased subset. Finally, we demonstrate thatour observational processing of the X-ray and tSZ signals is free ofsignificant biases. We find that our optical group selection procedure has,however, some room for improvement.

Multi-wavelength scaling relations in galaxy groups: a detailed comparison of GAMA and KiDS observations to BAHAMAS simulations