Revealing the Structure of a Pre-Transitional Disk: The Case of the Herbig F Star SAO 206462 (HD 135344B)
| Autor: | Sean D. Brittain, Glenn Schneider, Th. Henning, Karen A. Collins, David K. Lynch, M. Troutman, Daniel Apai, L. Beerman, Carol A. Grady, Ray W. Russell, W. J. Carpenter, Gerard M. Williger, Heidi B. Hammel, Bruce E. Woodgate, Dean C. Hines, Kenji Hamaguchi, M. Clampin, David J. Wilner, Paul S. Smith, Francois Menard, Michael L. Sitko, K. E. Ablordeppey, M. D. Silverstone, Misato Fukagawa, R. L. Kimes, R. Pearson |
|---|---|
| Přispěvatelé: | Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Physics
Debris disk Infrared excess 010504 meteorology & atmospheric sciences Astrophysics::High Energy Astrophysical Phenomena Astronomy Astronomy and Astrophysics Radius Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Planetary system 01 natural sciences 13. Climate action Space and Planetary Science 0103 physical sciences Thick disk Radiative transfer Spectral energy distribution Circumstellar dust Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2009, 699, pp.1822. ⟨10.1088/0004-637X/699/2/1822⟩ |
| ISSN: | 0004-637X 1538-4357 |
| Popis: | International audience; SAO 206462 (HD 135344B) has previously been identified as a Herbig F star with a circumstellar disk with a dip in its infrared excess near 10 μm. In combination with a low accretion rate estimated from Br γ, it may represent a gapped, but otherwise primordial or "pre-transitional" disk. We test this hypothesis with Hubble Space Telescope coronagraphic imagery, FUV spectroscopy and imagery and archival X-ray data, and spectral energy distribution (SED) modeling constrained by the observed system inclination, disk outer radius, and outer disk radial surface brightness (SB) profile using the Whitney Monte Carlo Radiative Transfer Code. The essentially face-on (i lsim 20°) disk is detected in scattered light from 0farcs4 to 1farcs15 (56-160 AU), with a steep (r -9.6) radial SB profile from 0farcs6 to 0farcs93. Fitting the SB data requires a concave upward or anti-flared outer disk, indicating substantial dust grain growth and settling by 8 ± 4 Myr. The warm dust component is significantly variable in near to mid-IR excess and in temperature. At its warmest, it appears confined to a narrow belt from 0.08 to 0.2 AU. The steep SED for this dust component is consistent with grains with a |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|