Cosmic Rays Masquerading as Hot CGM Gas: An Inverse-Compton Origin for Diffuse X-ray Emission in the Circumgalactic Medium

Observations from _ROSAT_ and _eROSITA_ have argued that Milky Way (MW), Andromeda, and lower-mass galaxies exhibit extended soft X-ray ($1\,$keV) diffuse halos out to radii $R\gtrsim 100\,$kpc in the circumgalactic medium (CGM). If interpreted as thermal emission from hot gas, the surprisingly sha...

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Bibliographic Details
Main Authors: Philip F. Hopkins, Eliot Quataert, Sam B. Ponnada, Emily Silich
Format: Article
Language:English
Published: Maynooth Academic Publishing 2025-06-01
Series:The Open Journal of Astrophysics
Online Access:https://doi.org/10.33232/001c.141293
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