Galaxy cluster virial-shock sources in eROSITA catalogs

Context. Virial shocks around galaxy clusters and groups are being mapped, thus tracing accretion onto large-scale structure. Aims. Following the recent identification of discrete ROSAT and radio sources associated with the virial shocks of MCXC clusters and groups, we examined the eROSITA-DE Early...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2024-06, Vol.686, p.L16
Main Authors: Ilani, Gideon, Hou, Kuan-Chou, Nadler, Gil, Keshet, Uri
Format: Article
Language:English
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Summary:Context. Virial shocks around galaxy clusters and groups are being mapped, thus tracing accretion onto large-scale structure. Aims. Following the recent identification of discrete ROSAT and radio sources associated with the virial shocks of MCXC clusters and groups, we examined the eROSITA-DE Early Data Release (EDR) to see whether it shows virial-shock X-ray sources within its 140 deg 2 field. Methods. EDR catalog sources were stacked and radially binned around EDR catalog clusters and groups. The properties of the excess virial-shock sources were inferred statistically by comparing the virial-shock region to the field. Results. We find an excess of X-ray sources narrowly localized at the 2.0 
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/202449819