GROUND-BASED NEAR-INFRARED IMAGING OF THE HD 141569 CIRCUMSTELLAR DISK
作者： A. Boccaletti , J.‐C. Augereau , F. Marchis , J. Hahn
DOI: 10.1086/346019
关键词: Astrophysics 、 Physics 、 Adaptive optics 、 Debris disk 、 Surface brightness 、 Telescope 、 Circumstellar disk 、 Particle-size distribution 、 Be star 、 Grain size 、 Astronomy
摘要: We present the first ground-based near-infrared image of circumstellar disk around post-Herbig Ae/Be star HD 141569A initially detected with Hubble Space Telescope (HST). Observations were carried out in near-IR (2.2 μm) at Palomar 200 inch telescope using adaptive optics system PALAO. The main large-scale asymmetric features are on our data. In addition, we measured that surface brightness is slightly different than derived by HST observations (at 1.1 and 1.6 μm). interpret this possible color effect terms dust properties derive a minimal grain size 0.6 ± 0.2 μm for compact grains power-law index distribution smaller -3. Basic dynamical considerations consistent presence remnant amount gas disk.
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