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February 24, 20260 citations

The SZ-Mass scaling relation with the NIKA2 SZ Large Program

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AMA. Moyer-AninRAR. AdamPAP. A. R. Ade

Key Points

  • The aim is to establish the SZ-Mass scaling relation for clusters at higher redshifts to improve cosmological parameter constraints.
  • Utilized data from the NIKA2 SZ Large Program (LPSZ)
  • Analyzed clusters at intermediate to high redshift (z = 0.5 to z = 0.9)
  • Observed clusters in both SZ and X-ray at high-angular resolution
  • Calibrated scaling relation parameters using LPSZ data
  • Established a new SZ-Mass scaling relation for higher redshift clusters
  • Demonstrated the effectiveness of the scaling relation in cosmological analysis
  • Showed improved accuracy in mass determination for clusters in the studied redshift range

Abstract

In Sunyaev-Zeldovich (SZ) cluster cosmology, accurately determining cluster masses is crucial for constraining cosmological parameters through cluster number counts. As the mass is not an observable, a scaling relation is needed to link cluster masses to the integrated Compton parameter Y, i.e., the SZ observable, to exploit data from large millimeter surveys. Former cosmological results use a scaling relation obtained with clusters at low redshift (z < 0.5) observed in X-ray and in SZ at an angular resolution above 1 arcminute. The SZ large program (LPSZ) of the NIKA2 collaboration uses a sample of clusters at intermediate to high redshift (from z = 0.5 to z = 0.9) observed at similarly high-angular resolution both in SZ and in X-ray. We present the SZ-Mass scaling relation parameters calibrated thanks to the LPSZ data.

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Cite This Study

Moyer-Anin et al. (2026) studied this question.

synapsesocial.com/papers/699d3fd9de8e28729cf6497ahttps://doi.org/10.1051/epjconf/202635301011/pdf
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