STRUCTURAL PARAMETERS OF THE MESSIER 87 GLOBULAR CLUSTERS

@article{Madrid2009STRUCTURALPO,
  title={STRUCTURAL PARAMETERS OF THE MESSIER 87 GLOBULAR CLUSTERS},
  author={Juan Pablo Madrid and William E. Harris and John P. Blakeslee and Mat{\'i}as G{\'o}mez},
  journal={The Astrophysical Journal},
  year={2009},
  volume={705},
  pages={237 - 244}
}
We derive structural parameters for ∼2000 globular clusters in the giant Virgo elliptical Messier 87 (M87) using extremely deep Hubble Space Telescope images in F606W (V) and F814W (I) taken with the ACS/WFC. The cluster scale sizes (half-light radii rh) and ellipticities are determined from point-spread-function -convolved King-model profile fitting. We find that the rh distribution closely resembles the inner Milky Way clusters, peaking at rh ≃ 2.5 pc and with virtually no clusters more… 

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