THE INFORMATION CONTENT OF STELLAR HALOS: STELLAR POPULATION GRADIENTS AND ACCRETION HISTORIES IN EARLY-TYPE ILLUSTRIS GALAXIES

@article{Cook2016THEIC,
  title={THE INFORMATION CONTENT OF STELLAR HALOS: STELLAR POPULATION GRADIENTS AND ACCRETION HISTORIES IN EARLY-TYPE ILLUSTRIS GALAXIES},
  author={Bruce Cook and Charlie Conroy and Annalisa Pillepich and Vicente Rodriguez-Gomez and Lars Hernquist},
  journal={The Astrophysical Journal},
  year={2016},
  volume={833},
  pages={158}
}
  • Bruce Cook, Charlie Conroy, +2 authors Lars Hernquist
  • Published 2016
  • Physics
  • The Astrophysical Journal
  • Long dynamical timescales in the outskirts of galaxies preserve the information content of their accretion histories, for example in the form of stellar population gradients. We present a detailed analysis of the stellar halo properties of a statistically representative sample of early-type galaxies from the Illustris simulation and show that stellar population gradients at large radii can indeed be used to infer basic properties of galactic accretion histories. We measure metallicity, age, and… CONTINUE READING

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