# 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={L. Close and K. Follette and J. Males and A. Puglisi and M. Xompero and D. Apai and J. Najita and A. Weinberger and K. Morzinski and T. Rodigas and P. Hinz and V. Bailey and R. Briguglio},
journal={The Astrophysical Journal},
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… Expand
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