The stellar initial mass function of early-type galaxies from low to high stellar velocity dispersion: homogeneous analysis of atlas3D and Sloan Lens ACS galaxies

@article{Posacki2015TheSI,
  title={The stellar initial mass function of early-type galaxies from low to high stellar velocity dispersion: homogeneous analysis of atlas3D and Sloan Lens ACS galaxies},
  author={Silvia Posacki and Michele Cappellari and Tommaso Treu and Silvia Pellegrini and Luca Ciotti University of Bologna and University of Oxford and University of Southern California},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2015},
  volume={446},
  pages={493-509}
}
We present an investigation about the shape of the initial mass function (IMF) of early-type galaxies (ETGs), based on a joint lensing and dynamical analysis, and on stellar population synthesis models, for a sample of 55 lens ETGs identified by the Sloan Lens ACS (SLACS) Survey. We construct axisymmetric dynamical models based on the Jeans equations which allow for orbital anisotropy and include a dark matter halo. The models reproduce in detail the observed \textit{HST} photometry and are… 
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