The Origin of Runaway Stars

  title={The Origin of Runaway Stars},
  author={Ronnie Hoogerwerf and Jos de Bruijne and P. Tim de Zeeuw},
  journal={The Astrophysical Journal Letters},
  pages={L133 - L136}
Milliarcsecond astrometry provided by Hipparcos and by radio observations makes it possible to retrace the orbits of some of the nearest runaway stars and pulsars to determine their site of origin. The orbits of the runaways AE Aurigae and μ Columbae and of the eccentric binary ι Orionis intersected each other ~2.5 Myr ago in the nascent Trapezium cluster, confirming that these runaways were formed in a binary-binary encounter. The path of the runaway star ζ Ophiuchi intersected that of the… 

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