Gaia Parallax of Milky Way Globular Clusters -- A Solution of Mixture Model

Understand

We have established a mixture model approach to derive the parallax of the Milky Way globular clusters.

• It avoids the problem of cluster membership determination and provides a completely independent astrometrical solution by purely using the parallax data.
• This method is validated with simulated clusters of \cite{2017MNRAS.467..412P}.
• We have resolved 120 real globular clusters by the mixture model using parallaxes of the second data release of \gaia.