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Correlation between grain growth and disk geometry in Herbig Ae/Be systems
- Source :
- Astronomy and Astrophysics; August 2004, Vol. 422 Issue: 2 p621-626, 6p
- Publication Year :
- 2004
-
Abstract
- We have calculated the (sub-)mm spectral indices of 26 Herbig Ae/Be stars, for which we can determine the infrared spectral energy distribution (SED). We find a clear correlation between the strength of the ratio of the near- to mid-infrared excess of these sources, and the slope of the (sub-)mm energy distribution. Based on earlier multi-dimensional modeling of disks around Herbig Ae stars, we interpret this as a correlation between the geometry of the disk (flared or self-shadowed) and the size of the grains: self-shadowed disks have, on average, larger grains than their flared counterparts. These data suggest that the geometry of a young stellar disk evolves from flared to self-shadowed.
Details
- Language :
- English
- ISSN :
- 00046361 and 14320746
- Volume :
- 422
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- Astronomy and Astrophysics
- Publication Type :
- Periodical
- Accession number :
- ejs53200473
- Full Text :
- https://doi.org/10.1051/0004-6361:20040197