Unravelling the origins of S0 galaxies using maximum likelihood analysis of planetary nebulae kinematics

@article{Cortesi2011UnravellingTO,
  title={Unravelling the origins of S0 galaxies using maximum likelihood analysis of planetary nebulae kinematics},
  author={Arianna Cortesi and Michael Merrifield and Magda Arnaboldi and Ortwin Gerhard and Inma Martinez-Valpuesta and Kanak Saha and Lodovico Coccato and Steven Bamford and Nicola R. Napolitano and Payel Das and Nigel G. Douglas and Aaron J. Romanowsky and Konrad Kuijken and Massimo Capaccioli and Kenneth C. Freeman},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2011},
  volume={414},
  pages={642-651}
}
To investigate the origins of S0 galaxies, we present a new method of analysing their stellar kinematics from discrete tracers such as planetary nebulae. This method involves binning the data in the radial direction so as to extract the most general possible non-parametric kinematic profiles, and using a maximum-likelihood fit within each bin in order to make full use of the information in the discrete kinematic tracers. Both disc and spheroid kinematic components are fitted, with a two… 
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