Constraining the Variability and Binary Fraction of Galactic Center Young Stars
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Constraining the Variability and Binary Fraction of Galactic Center Young Stars

  • Author(s): Gautam, AK
  • Do, T
  • Ghez, AM
  • Lu, JR
  • Morris, MR
  • Sakai, S
  • Witzel, G
  • Sitarski, BN
  • Chappell, S
  • et al.
Abstract

We present constraints on the variability and binarity of young stars in the central 10 arcseconds (~0.4 pc) of the Milky Way Galactic Center (GC) using Keck Adaptive Optics data over a 12 year baseline. Given our experiment's photometric uncertainties, at least 36% of our sample's known early-type stars are variable. We identified eclipsing binary systems by searching for periodic variability. In our sample of spectroscopically confirmed and likely early-type stars, we detected the two previously discovered GC eclipsing binary systems. We derived the likely binary fraction of main sequence, early-type stars at the GC via Monte Carlo simulations of eclipsing binary systems, and find that it is at least 32% with 90% confidence.

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