Thermal or Non-thermal? Diffuse emission in the infall region of stacked galaxy groups

arXiv:2607.27804 · astro-ph.HE, astro-ph.CO · Submitted 2026-07-30 · Read on arXiv

E. Bulbul, X. Zhang, Z. Ding, T. Mistele, M. Kluge, E. Artis, Y. E. Bahar, K. Dennerl, D. Eckert, L. Fiorino, P. F. Hopkins, N. Malavasi, A. Merloni, K. Nandra, E. Quataert, M. E. Ramos-Ceja, J. S. Sanders, J. Strunk, S. Zelmer

astro-ph.HE, astro-ph.CO

Submitted: 2026-07-30

Comments: Submitted to A&A, 12 pages, 5 figures, 1 table

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 23× in this paper · explained in 1 episode
• AGN — 16× in this paper · explained in 1 episode
• Inverse Compton — 15× in this paper
• Calibration — 12× in this paper · explained in 7 episodes
• Accretion Shock — 6× in this paper · explained in 1 episode
• Trace — 5× in this paper · explained in 2 episodes
• Core — 4× in this paper · explained in 2 episodes
• Cosmic X-ray Background — 4× in this paper
• Metallicity — 4× in this paper · explained in 3 episodes
• AGN Feedback — 3× in this paper · explained in 1 episode
• Max Planck Institute for Extraterrestrial Physics — 2× in this paper
• Bayesian Framework — 1× in this paper · explained in 3 episodes
• Bayesian X-ray Analysis — 1× in this paper
• Robustness — 1× in this paper · explained in 5 episodes
• Society of PhotoOptical Instrumentation Engineers — 1× in this paper
• Spectrum Roentgen Gamma — 1× in this paper

Sources

• The case for large-scale AGN feedback in galaxy formation simulations: insights from XFABLE
• The SRG/eROSITA All-Sky Survey. The Weak-Lensing Mass Calibration and the Stellar Mass-to-Halo Mass Relation from the Hyper Suprime-Cam Subaru Strategic Program
• Extreme AGN feedback in the fossil galaxy group SDSSTG 4436
• Evidence for large baryonic feedback at low and intermediate redshifts from kinematic Sunyaev-Zel'dovich observations with ACT and DESI photometric galaxies
• Observational Implications of Cosmic Ray-Inverse Compton 'Boosted' Cool Cores in Clusters
• The SRG/eROSITA All-Sky Survey. Optical identification and properties of galaxy clusters and groups in the western galactic hemisphere
• The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
• The SRG/eROSITA All-Sky Survey : Subaru/HSC-SSP weak-lensing mass measurements for the eRASS1 Galaxy Clusters
• The hot gas mass fraction in halos. From Milky Way-like groups to massive clusters
• The SRG/eROSITA all-sky survey: X-ray scaling relations of galaxy groups and clusters in the western Galactic hemisphere
• The suppression of the matter power spectrum: strong feedback from X-ray gas mass fractions, kSZ effect profiles, and galaxy-galaxy lensing
• The SRG/eROSITA All-Sky Survey. Detection of shock-heated gas beyond the halo boundary into the accretion region

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