CAMIRA clusters in the eFEDS field Virtual Observatory Resource

Authors
  1. Nguyen-Dang N.T.
  2. Ota N.
  3. Okabe N.
  4. Oguri M.
  5. Mitsuishi I.
  6. Reiprich T.H.,Pacaud F.
  7. Bulbul E.
  8. Sanders J.S.
  9. Brueggen M.
  10. Liu A.
  11. Tsujita Y.,Chiu I.
  12. Ghirardini V.
  13. Grandis S.
  14. Klein M.
  15. Migkas K.
  16. Miyatake H.,Miyazaki S.
  17. Ramos-Ceja M.E.
  18. Published by
    CDS
Abstract

This is the second paper in a series exploring the X-ray properties of galaxy clusters optically selected by the Subaru Hyper Suprime-Cam (HSC) survey, using data from the SRG/eROSITA Final Equatorial-Depth Survey (eFEDS). We aim to investigate scaling relations between observable cluster properties and mass, and to study the radial X-ray profiles of a large sample of optically selected clusters. We analyze a sample of 997 CAMIRA clusters with richness N>15 and redshifts of 0.1<z<1.3. Using bolometric luminosities derived from count rates and a weak-lensing mass calibration, we study the L-M and N-M scaling relations through stacking analysis, while accounting for selection effects and redshift evolution. We also compare clusters with and without X-ray counterparts in the eFEDS catalog in terms of their scaling relations and surface brightness profiles. The best-fit L-M slope (1.56^+0.14^_-0.12_) is slightly steeper than the self-similar prediction, yet remains consistent with our previous findings. The N-M slope (0.766^+0.070^_-0.060_) broadly agrees with theoretical expectations and other optical samples. The data do not require any additional redshift evolution beyond the standard self-similar scaling, although current constraints on evolution remain weak. X-ray detected clusters exhibit a marginally steeper L-M slope, higher central surface brightness, and more centrally concentrated X-ray profiles than undetected systems. Our results highlight systematic differences in the X-ray properties between optically and X-ray selected cluster samples. This study extends scaling relation analyses into lower mass and luminosity regimes, demonstrating the value of combining deep X-ray and optical surveys like eROSITA and Subaru HSC.

Keywords
  1. galaxy-clusters
  2. x-ray-sources
  3. galaxy-classification-systems
Bibliographic source Bibcode
2026A&A...710A.202N
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History

2026-06-16T07:42:02Z
Resource record created
2026-06-16T06:42:38Z
Updated
2026-06-16T07:42:02Z
Created

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