The Milky Way Has No Distinct Thick Disk

@article{Bovy2011TheMW,
  title={The Milky Way Has No Distinct Thick Disk},
  author={J. Bovy and H. Rix and D. Hogg},
  journal={The Astrophysical Journal},
  year={2011},
  volume={751},
  pages={131}
}
Different stellar sub-populations of the Milky Way's stellar disk are known to have different vertical scale heights, their thickness increasing with age. Using SEGUE spectroscopic survey data, we have recently shown that mono-abundance sub-populations, defined in the [α/Fe]-[Fe/H] space, are well described by single-exponential spatial-density profiles in both the radial and the vertical direction; therefore, any star of a given abundance is clearly associated with a sub-population of scale… Expand

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The age–metallicity structure of the Milky Way disc using APOGEE
The stellar population structure of the Galactic disk
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The Gaia-ESO Survey: characterisation of the [α/Fe] sequences in the Milky Way discs
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