High Galactic latitude runaway stars as tracers of the spiral arms

@article{Silva2013HighGL,
  title={High Galactic latitude runaway stars as tracers of the spiral arms},
  author={M Silva and Ralf Napiwotzki},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={431},
  pages={502-510}
}
A direct observation of the spiral structure of the Galaxy is hindered by our position in the middle of the Galactic plane. We propose a method based on the analysis of the birthplaces of high Galactic latitude runaway stars to map the spiral arms and determine their dynamics. As a proof of concept, the method is applied to a local sample of early-type stars and a sample of runaways stars to obtain estimates of the pattern speed (p,local = 20.3 ± 0.5 kms −1 kpc −1 and p,runaway = 21.9 ± 8.6 kms… 

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