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- W3201508488 endingPage "1581" @default.
- W3201508488 startingPage "1563" @default.
- W3201508488 abstract "ABSTRACT The circumgalactic medium (CGM) encodes signatures of the galaxy-formation process, including the interaction of galactic outflows driven by stellar and supermassive black hole (SMBH) feedback with the gaseous halo. Moving beyond spherically symmetric radial profiles, we study the angular dependence of CGM properties around z = 0 massive galaxies in the IllustrisTNG simulations. We characterize the angular signal of density, temperature, and metallicity of the CGM as a function of galaxy stellar mass, halo mass, distance, and SMBH mass, via stacking. TNG predicts that the CGM is anisotropic in its thermodynamical properties and chemical content over a large mass range, $M_*sim 10^{10-11.5}, mathrm{M}_odot$. Along the minor axis directions, gas density is diluted, whereas temperature and metallicity are enhanced. These feedback-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, $M_*sim 10^{10.8}, mathrm{M}_odot$. In TNG, this mass scale corresponds to the onset of efficient SMBH feedback and the production of strong outflows. By comparing the anisotropic signals predicted by TNG versus other simulations – Illustris and EAGLE – we find that each simulation produces distinct signatures and mass dependencies, implying that this phenomenon is sensitive to the underlying physical models. Finally, we explore X-ray emission as an observable of this CGM anisotropy, finding that future X-ray observations, including the eROSITA all-sky survey, will be able to detect and characterize this signal, particularly in terms of an angular modulation of the X-ray hardness." @default.
- W3201508488 created "2021-09-27" @default.
- W3201508488 creator A5012777177 @default.
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- W3201508488 creator A5078649440 @default.
- W3201508488 creator A5078897197 @default.
- W3201508488 creator A5081711451 @default.
- W3201508488 date "2021-09-17" @default.
- W3201508488 modified "2023-10-01" @default.
- W3201508488 title "Predictions for anisotropic X-ray signatures in the circumgalactic medium: imprints of supermassive black hole driven outflows" @default.
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- W3201508488 doi "https://doi.org/10.1093/mnras/stab2638" @default.
- W3201508488 hasPublicationYear "2021" @default.
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