Correlation between grain growth and disk geometry in Herbig Ae/Be systems
Astrophysics
2009-11-10 v1
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.
Keywords
Cite
@article{arxiv.astro-ph/0404553,
title = {Correlation between grain growth and disk geometry in Herbig Ae/Be systems},
author = {B. Acke and M. E. van den Ancker and C. P. Dullemond and R. van Boekel and L. B. F. M. Waters},
journal= {arXiv preprint arXiv:astro-ph/0404553},
year = {2009}
}
Comments
7 pages, 3 figures, A&A accepted