Scalar field “mini-MACHOs”: A new explanation for galactic dark matter

@article{Hernandez2004ScalarF,
  title={Scalar field “mini-MACHOs”: A new explanation for galactic dark matter},
  author={Xavier Hern'andez and Tonatiuh Matos and Roberto A. Sussman and Yosef Verbin},
  journal={Physical Review D},
  year={2004},
  volume={70},
  pages={043537}
}
We examine the possibility that galactic halos are collisionless ensembles of scalar field ``massive compact halo objects'' (MACHOs). Using mass constraints from MACHO microlensing and from theoretical arguments on halos made up of massive black holes, as well as demanding also that scalar MACHO ensembles of all scales do not exhibit gravothermal instability (as required by consistency with observations of LSB galaxies), we obtain the range: $m\ensuremath{\lesssim}{10}^{\ensuremath{-}7}{M}_… 

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