@inproceedings{beeee51ad10b4f779a29a553ff01fa7b,
title = "Visible AO observations at halpha for accreting young planets",
abstract = "We utilized the new high-order (250-378 mode) Magellan Adaptive Optics system (MagAO) to obtain very high-resolution science in the visible with MagAO's VisAO CCD camera. In the good-median seeing conditions of Magellan (0.5-0.7″) we find MagAO delivers individual short exposure images as good as 19 mas optical resolution. Due to telescope vibrations, long exposure (60s) r' (0.63μm) images are slightly coarser at FWHM = 23-29 mas (Strehl ~ 28%) with bright (R < 9 mag) guide stars. These are the highest resolution filled-aperture images published to date. Images of the young (~ 1 Myr) Orion Trapezium θ1 Ori A, B, and C cluster members were obtained with VisAO. In particular, the 32 mas binary θ1 Ori C 1 C 2 was easily resolved in non-interferometric images for the first time. Relative positions of the bright trapezium binary stars were measured with ~ 0.6-5 mas accuracy. In the second commissioning run we were able to correct 378 modes and achieved good contrasts (Strehl>20% on young transition disks at Hα). We discuss the contrasts achieved at Hα and the possibility of detecting low mass (~ 1-5 Mjup) planets (past 5AU) with our new SAPPHIRES survey with MagAO at Hα.",
keywords = "Adaptive Optics, Extra-solar Planets",
author = "Close, {L. M.} and K. Follette and Males, {J. R.} and K. Morzinski and Rodigas, {T. J.} and P. Hinz and Wu, {Y. L.} and D. Apai and J. Najita and A. Puglisi and S. Esposito and A. Riccardi and V. Bailey and M. Xompero and R. Briguglio and A. Weinberger",
year = "2013",
month = jun,
doi = "10.1017/S1743921313007734",
language = "English",
isbn = "9781107045200",
series = "Proceedings of the International Astronomical Union",
publisher = "Cambridge University Press",
number = "S299",
pages = "32--33",
booktitle = "Exploring the Formation and Evolution of Planetary Systems",
address = "United Kingdom",
edition = "S299",
}