Grain growth in the inner regions of Herbig Ae/Be star disks

149Citations
Citations of this article
26Readers
Mendeley users who have this article in their library.

Abstract

We present new mid-infrared spectroscopy of the emission from warm circumstellar dust grains in Herbig Ae/Be stars. Our survey significantly extends the sample that was studied by Bouwman et al. (2001). We find a correlation between the strength of the silicate feature and its shape. We interpret this as evidence for the removal of small (0.1 μm) grains from the disk surface while large (1-2 μm) grains persist. If the evolution of the grain size distribution is dominated by gravitational settling, large grains are expected to disappear first, on a timescale which is much shorter than the typical age of our programme stars. Our observations thus suggest a continuous replenishment of micron sized grains at the disk surface. If the grain replenishment is due to the dredge-up of dust from the disk interior, the mineralogy we observe is representative of the bulk composition of dust in these stars.

Cite

CITATION STYLE

APA

Van Boekel, R., Waters, L. B. F. M., Dominik, C., Bouwman, J., De Koter, A., Dullemond, C. P., & Paresce, F. (2003). Grain growth in the inner regions of Herbig Ae/Be star disks. Astronomy and Astrophysics, 400(3). https://doi.org/10.1051/0004-6361:20030141

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free