Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-05-27
Astronomy and Astrophysics
Astrophysics
9 pages, 2 figures. accepted to ApJL
Scientific paper
10.1086/312159
IR and mm-wave emission from Herbig Ae/Be stars has produced conflicting conclusions regarding the dust geometry in these objects. We show that the compact dimensions of the mm-wave emitting regions are a decisive indication for disks. But a disk cannot explain the spectral energy distribution (SED) unless it is embedded in an extended envelope that (1) dominates the IR emission and (2) provides additional disk heating on top of the direct stellar radiation. Detailed radiative transfer calculations based on the simplest model for envelope-embedded disks successfully fit the data from UV to mm wavelengths and show that the disks have central holes. This model also resolves naturally some puzzling results of IR imaging.
Elitzur Moshe
Ivezic Zeljko
Miroshnichenko Anatholy
Vinkovic' Dejan
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