2002/11/29 by A. Boccaletti, J. C. Augereau, J.‐C. Augereau +4 · 46 citations
Physics and Astronomy · #Adaptive optics #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Brightness #Circumstellar disk #Circumstellar dust #Debris disk #Grain size #Hubble space telescope #Infrared #Materials science #Near-infrared spectroscopy #Optics #Physics #Planetary system #Spitzer Space Telescope #Stars #Stellar, planetary, and galactic studies #Surface brightness #Telescope #astro-ph
paper · pdf · doi:10.1086/346019
published in The Astrophysical Journal 585(1), 494-501 (IOP Publishing) · 15 pages, to appear in ApJ March 1, 2003 issue, figures available at: http://wwwusr.obspm.fr/~boccalet/Publications/ApJ55797.preprint.pdf
arxiv created 2002/11/29 · openalex publication_date 2003/03/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We present the first ground-based near-infrared image of the circumstellar disk around the post-Herbig Ae/Be star HD 141569A initially detected with the Hubble Space Telescope ( HST ). Observations were carried out in the near-IR (2.2 μm) at the Palomar 200 inch telescope using the adaptive optics system PALAO. The main large-scale asymmetric features of the disk are detected on our ground-based data. In addition, we measured that the surface brightness of the disk is slightly different than that derived by HST observations (at 1.1 and 1.6 μm). We interpret this possible color effect in terms of dust properties and derive a minimal grain size of 0.6 ± 0.2 μm for compact grains and a power-law index for the grain size distribution smaller than -3. Basic dynamical considerations are consistent with the presence of a remnant amount of gas in the disk.