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Title:
Visible AO Observations at Halpha for Accreting Young Planets
Authors:
Close, L. M.; Follette, K.; Males, J. R.; Morzinski, K.; Rodigas, T. J.; Hinz, P.; Wu, Y.-L.; Apai, D.; Najita, J.; Puglisi, A.; Esposito, S.; Riccardi, A.; Bailey, V.; Xompero, M.; Briguglio, R.; Weinberger, A.
Affiliation:
AA(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AB(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AC(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AD(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AE(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AF(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AG(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AH(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AI(NOAO, Tucson AZ 85721, USA), AJ(INAF - Osservatorio Astrofisico di Arcetri, I-50125, Firenze, Italy), AK(INAF - Osservatorio Astrofisico di Arcetri, I-50125, Firenze, Italy), AL(INAF - Osservatorio Astrofisico di Arcetri, I-50125, Firenze, Italy), AM(Steward Observatory, University of Arizona, Tucson, AZ 85721, USA), AN(INAF - Osservatorio Astrofisico di Arcetri, I-50125, Firenze, Italy), AO(INAF - Osservatorio Astrofisico di Arcetri, I-50125, Firenze, Italy), AP(Carnegie DTM, Washingtion DC. USA)
Publication:
Exploring the Formation and Evolution of Planetary Systems, Proceedings of the International Astronomical Union, IAU Symposium, Volume 299, pp. 32-33
Publication Date:
01/2014
Origin:
CUP
Keywords:
Extra-solar Planets, Adaptive Optics,
Abstract Copyright:
(c) 2014: Copyright © International Astronomical Union 2013
DOI:
10.1017/S1743921313007734
Bibliographic Code:
2014IAUS..299...32C

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' (0.63mum) 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 theta1 Ori A, B, and C cluster members were obtained with VisAO. In particular, the 32 mas binary theta1 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 Halpha). We discuss the contrasts achieved at Halpha and the possibility of detecting low mass (~ 1-5 Mjup) planets (past 5AU) with our new SAPPHIRES survey with MagAO at Halpha.

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