The four-quadrant phase mask coronagraph. IV. First light at the Very Large Telescope

被引：77

作者：

Boccaletti, A

Riaud, P

Baudoz, P

Baudrand, J

Rouan, D

Gratadour, D

Lacombe, F

Lagrange, AM

机构：

[1] Observ Paris, LESIA, F-92195 Meudon, France

[2] Inst Astrophys & Geophys Liege, B-4000 Liege, Belgium

[3] Observ Grenoble, Astrophys Lab, F-38041 Grenoble 9, France

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2004年 / 116卷 / 825期

关键词：

D O I：

10.1086/425735

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first high-contrast images obtained at the ESO Very Large Telescope using a four-quadrant phase mask coronagraph. The two-night commissioning was carried out in 2004 January on NACO, the near-IR camera with adaptive optics at UT4. We evaluated the behavior of the coronagraph on a variety of astrophysical targets: binary stars, circumstellar disks, and active galactic nuclei. The performance of the coronagraph is in agreement with our expectations based on numerical simulations. The phase mask provides a stellar peak attenuation of a factor of about 10 on average ( for long exposure), and its performance is limited only by the phase residuals ( mainly low-order aberrations) that are left uncorrected by the adaptive optics system.

引用

页码：1061 / 1071

页数：11

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