VLT/NACO coronagraphic observations of fine structures in the disk of β Pictoris

被引：0
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作者：
Boccaletti, A. [1 ]
Augereau, J.C. [2 ]
Baudoz, P. [1 ]
Pantin, E. [3 ]
Lagrange, A.M. [2 ]
机构：
[1] LESIA, Observatoire de Paris-Meudon, 92195 Meudon, France
[2] Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier, CNRS, UMR 5571, Grenoble, France
[3] Service d'Astrophysique, CEA Saclay, 91191 Gif-sur-Yvette, France
来源：
Astronomy and Astrophysics | 2009年 / 495卷 / 02期
关键词：
Aims. We present ground-based observations of the disk around the A-type star β Pictoris to obtain scattered light images at the highest angular resolution (60mas; equivalent to about 1 AU at the distance of the star) and the highest contrast in the very close environment of the star. The purpose of this program is to perform a close inspection of the inner disk morphology.Methods. Images were collected with NACO; the AO-assisted near-IR instrument on the VLT (ESO) which includes two types of coronagraphs: classical Lyot masks and phase masks. In this program we took advantage of both types of coronagraphs in two spectral bands; H-band for the Lyot mask and Ks-band for the phase mask. The Lyot mask blocks a large central region around the star (radius;
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页码：523 / 535
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