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This study shows that cold dark matter models accurately predict galaxy and black hole evolution. Alternative dark matter types like fuzzy or warm dark matter are less likely based on observed stellar-black hole mass relations.

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Area of Science:

  • Cosmology
  • Astrophysics
  • Particle Physics

Background:

  • Semianalytical models are crucial for understanding galaxy and supermassive black hole (SMBH) evolution within the cold dark matter (CDM) paradigm.
  • Previous models successfully reproduced stellar-black hole mass relations consistent with both James Webb Space Telescope (JWST) and pre-JWST observations.

Purpose of the Study:

  • To investigate the impact of alternative dark matter models (fuzzy dark matter and warm dark matter) on galaxy and SMBH evolution.
  • To constrain the properties of dark matter particles by analyzing the stellar-black hole mass relation.

Main Methods:

  • Utilized a semianalytical model for galaxy and SMBH evolution.
  • Compared model predictions with observational data, focusing on the stellar-black hole mass relation.
  • Analyzed the suppression of small galactic halo formation in alternative dark matter scenarios.

Main Results:

  • The CDM model accurately reproduces observed stellar-black hole mass relations.
  • Fuzzy dark matter (FDM) and warm dark matter (WDM) would suppress the formation of crucial small galactic halos.
  • The stellar-black hole mass relation disfavors FDM with masses <2.0×10⁻²⁰ eV and WDM with masses <7.2 keV at 95% confidence.

Conclusions:

  • The study provides strong constraints on FDM and WDM particle masses.
  • The findings support the viability of the CDM paradigm for explaining observed cosmic structures and black hole growth.
  • Observational data on stellar-black hole mass relations serve as a powerful tool for distinguishing between dark matter models.