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 circumgalactic medium (CGM) encodes signatures of the galaxy-formationprocess, including the interaction of galactic outflows driven by stellar andsupermassive black hole (SMBH) feedback with the gaseous halo. Moving beyondspherically symmetric radial profiles, we study the \textit{angular} dependenceof CGM properties around $z=0$ massive galaxies in the IllustrisTNGsimulations. We characterize the angular signal of density, temperature, andmetallicity of the CGM as a function of galaxy stellar mass, halo mass,distance, and SMBH mass, via stacking. TNG predicts that the CGM is anisotropicin its thermodynamical properties and chemical content over a large mass range,$M_*\sim10^{10-11.5}M_\odot$. Along the minor axis directions, gas density isdiluted, whereas temperature and metallicity are enhanced. Thesefeedback-induced anisotropies in the CGM have a magnitude of $0.1-0.3$ dex,extend out to the halo virial radius, and peak at Milky Way-like masses,$M_*\sim10^{10.8}M_\odot$. In TNG, this mass scale corresponds to the onset ofefficient SMBH feedback and the production of strong outflows. By comparing theanisotropic signals predicted by TNG versus other simulations -- Illustris andEAGLE -- we find that each simulation produces distinct signatures and massdependencies, implying that this phenomenon is sensitive to the underlyingphysical models. Finally, we explore X-ray emission as an observable of thisCGM anistropy, finding that future X-ray observations, including the eROSITAall-sky survey, will be able to detect and characterize this signal,particularly in terms of an angular modulation of the X-ray hardness.

Predictions for anisotropic X-ray signatures in the circumgalactic medium: imprints of supermassive black hole driven outflows