A Multimass Velocity Dispersion Model of 47 Tucanae Indicates No Evidence for an Intermediate-mass Black Hole

  title={A Multimass Velocity Dispersion Model of 47 Tucanae Indicates No Evidence for an Intermediate-mass Black Hole},
  author={Christopher R. Mann and Harvey B. Richer and Jeremy Heyl and Jay Anderson and Jason S. Kalirai and Ilaria Caiazzo and Swantje D. M{\"o}hle and Alan M. Knee and Holger Baumgardt},
  journal={The Astrophysical Journal},
In this paper, we analyze stellar proper motions in the core of the globular cluster 47 Tucanae to explore the possibility of an intermediate-mass black hole (IMBH) influence on the stellar dynamics. Our use of short-wavelength photometry affords us an exceedingly clear view of stellar motions into the very center of the crowded core, yielding proper motions for > 50,000 stars in the central 2'. We model the velocity dispersion profile of the cluster using an isotropic Jeans model. The density… 

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