2007/11/26 by Paul Kalas, Gaspard Duchene, Gaspard Duchêne +2 · 2 citations
Physics and Astronomy · #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Circumstellar disk #Circumstellar dust #Cosmic dust #Debris #Debris disk #Geology #Halo #Line-of-sight #Particle size #Particle-size distribution #Physics #Planetary system #RADIUS #Spectral energy distribution #Spectral line #Star (game theory) #Stars #Stellar, planetary, and galactic studies #Thick disk #Thin disk #astro-ph
paper · pdf · doi:10.1086/525252
7 pages, 4 figures, ApJ Letters, in press
openalex publication_date 2007/11/26 · arxiv created 2007/12/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Using the Advanced Camera for Surveys aboard the Hubble Space Telescope , we have discovered dust-scattered light from the debris disk surrounding the F2 V star HD 15745. The circumstellar disk is detected between 2.0 '' and 7.5 '' radius, corresponding to 128-480 AU radius. The circumstellar disk morphology is asymmetric about the star, resembling a fan, and consistent with forward scattering grains in an optically thin disk with an inclination of ~67° to our line of sight. The spectral energy distribution and scattered light morphology can be approximated with a model disk composed of silicate grains between 60 and 450 AU radius, with a total dust mass of 10 −7 M ☉ (0.03 M ⊕ ), representing a narrow grain size distribution (1-10 μm). Galactic space motions are similar to the Castor moving group, with an age of ~10 8 yr, although future work is required to determine the age of HD 15745 using other indicators.