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June 19, 20260 citationsOpen Access

CDN-271: The Group Test

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NHNicky Joseph Hubertus Catharina Hacquier

Key Points

  • The study aims to evaluate the dark-matter reduction factor (R) at galaxy-group scales.
  • Tested the GCFT dark-matter reduction factor at galaxy groups with mass M~10^12-10^14 M_sun.
  • Measured the MOND interpolation function nu(x) for coupling analysis.
  • Confirmed R~0.70 with a 3-4x boost at x~0.1 under certain conditions.
  • Identified distinct coupling channels: nu(x) at g≤a0, and the kappa-proxy at g>>a0.

Abstract

Testing the GCFT dark-matter reduction factor at galaxy-group scale (M~10¹2-10¹4 Mₛun) reveals R~0. 70: the MOND interpolation function nu (x) is active (3-4x boost at x~0. 1) but insufficient in baryon-poor systems (fbar~10%). This confirms two distinct coupling channels: nu (x) at g>a0.

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Nicky Joseph Hubertus Catharina Hacquier (2026) studied this question.

synapsesocial.com/papers/6a34de7065a5b0777af2dcechttps://doi.org/10.5281/zenodo.20728413
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