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Figuring Out Gas & Galaxies In Enzo (FOGGIE). XIV. The Observability of Emission from Accretion and Feedback in the Circumgalactic Medium with Current and Future Instruments

  • Authors: Vida Saeedzadeh, Jason Tumlinson, Molly S. Peeples, Brian W. O'Shea, Cassandra Lochhaas, Lauren Corlies, Cameron W. Trapp, Britton D. Smith, Jessica K. Werk, Ayan Acharyya, Ramona Augustin, Nicolas Lehner, Anna C. Wright

Vida Saeedzadeh et al 2026 The Astrophysical Journal 1004 .

  • Provider: AAS Journals

Caption: Figure 3.

Radial surface brightness profiles for eight ions across all FOGGIE halos (face-on, 0.18 kpc resolution). Solid lines show median profiles including all gas; dashed lines show CGM-only emission after H I disk removal. Shaded regions indicate the range of halo-to-halo variation. Most ions follow power-law profiles, while Hα, Mg II, and Si II show a break in slope around 0.1 Rvir—reflecting a transition from disk to CGM-dominated emission. CGM-only profiles flatten at small radii for low-ionization species.

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