Are there brown dwarfs in globular clusters

@article{Bonnell2003AreTB,
  title={Are there brown dwarfs in globular clusters},
  author={Ian A. Bonnell and Cathie J. Clarke and Matthew R. Bate and Mark J. Mccaughrean and James Edward Pringle and Hans Zinnecker},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2003},
  volume={343}
}
We present an analytical method for constraining the substellar initial mass function in globular clusters, based on the observed frequency of transit events. Globular clusters typically have very high stellar densities where close encounters are relatively common, and thus tidal capture can occur to form close binary systems. Encounters between main-sequence stars and lower-mass objects can result in tidal capture if the mass ratio is ≥ 10 - 2 . If brown dwarfs exist in significant numbers… 

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