Is the silicate emission feature only influenced by grain size?
Astrophysics
2014-11-18 v2
Abstract
The flattening of the 10mu silicate emission feature observed in the spectra of T Tauri and Herbig Ae/Be stars is usually interpreted as an indicator of grain growth. We show in this paper that a similar behaviour of the feature shape occurs when the porosity of composite grains varies. The fluffy aggregates, having inclusions of different sizes, were modeled by multi-layered spheres consisting of amorphous carbon, amorphous silicate and vacuum. It is also found that the inclusion of crystalline silicates in composite porous particles can lead to a shift of the known resonances and production of new ones.
Keywords
Cite
@article{arxiv.0803.3227,
title = {Is the silicate emission feature only influenced by grain size?},
author = {N. V. Voshchinnikov and Th. Henning},
journal= {arXiv preprint arXiv:0803.3227},
year = {2014}
}
Comments
accepted by Astronomy & Astrophysics Letters; small revision after referee report