An Adaptive Optics Survey of Stellar Variability at the Galactic Center

@article{Gautam2019AnAO,
  title={An Adaptive Optics Survey of Stellar Variability at the Galactic Center},
  author={A. K. Gautam and T. Do and A. Ghez and M. Morris and G. Martinez and M. Hosek and J. Lu and S. Sakai and G. Witzel and S. Jia and E. Becklin and K. Matthews},
  journal={The Astrophysical Journal},
  year={2019},
  volume={871},
  pages={103}
}
  • A. K. Gautam, T. Do, +9 authors K. Matthews
  • Published 2019
  • Physics
  • The Astrophysical Journal
  • We present an ≈11.5 yr adaptive optics (AO) study of stellar variability and search for eclipsing binaries in the central ~0.4 pc (~10'') of the Milky Way nuclear star cluster. We measure the photometry of 563 stars using the Keck II NIRC2 imager (K'-band, λ_0 = 2.124 μm). We achieve a photometric uncertainty floor of Δm_K' ~ 0.03 (≈3%), comparable to the highest precision achieved in other AO studies. Approximately half of our sample (50% ± 2%) shows variability: 52% ± 5% of known early-type… CONTINUE READING

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