DISCOVERY OF Hα EMISSION FROM THE CLOSE COMPANION INSIDE THE GAP OF TRANSITIONAL DISK HD 142527

@article{Close2014DISCOVERYOH,
  title={DISCOVERY OF H$\alpha$ EMISSION FROM THE CLOSE COMPANION INSIDE THE GAP OF TRANSITIONAL DISK HD 142527},
  author={Laird M. Close and Katherine B. Follette and Jared R. Males and Alfio T. Puglisi and Marco Xompero and D{\'a}niel Apai and Joan Rie Najita and Alycia J. Weinberger and Katie M. Morzinski and Timothy J. Rodigas and Philip M. Hinz and Vanessa P. Bailey and Runa Briguglio},
  journal={The Astrophysical Journal Letters},
  year={2014},
  volume={781}
}
We utilized the new high-order 585 actuator Magellan Adaptive Optics system (MagAO) to obtain very high-resolution visible light images of HD 142527 with MagAO's VisAO science camera. In the median seeing conditions of the 6.5 m Magellan telescope (0.″5−0.″7), we find MagAO delivers 24%–19% Strehl at Hα (0.656 μm). We detect a faint companion (HD 142527B) embedded in this young transitional disk system at just 86.3 ± 1.9 mas (∼12 AU) from the star. The companion is detected in both Hα and a… 

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