Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-01-09
Astronomy and Astrophysics
Astrophysics
accepted in A&A, 21 pages, 9 figures
Scientific paper
10.1051/0004-6361:20065771
We propose a new description of astronomical dust emission in the spectral region from the Far-Infrared to millimeter wavelengths. Unlike previous classical models, this description explicitly incorporates the effect of the disordered internal structure of amorphous dust grains. The model is based on results from solid state physics, used to interpret laboratory data. The model takes into account the effect of absorption by Disordered Charge Distribution, as well as the effect of absorption by localized Two Level Systems. We review constraints on the various free parameters of the model from theory and laboratory experimental data. We show that, for realistic values of the free parameters, the shape of the emission spectrum will exhibit very broad structures which shape will change with the temperature of dust grains in a non trivial way. The spectral shape also depends upon the parameters describing the internal structure of the grains. This opens new perspectives as to identifying the nature of astronomical dust from the observed shape of the FIR/mm emission spectrum. A companion paper will provide an explicit comparison of the model with astronomical data.
Bernard J.-Ph.
Boudet Nathalie
Gromov V. V.
Mény Claude
Nayral C.
No associations
LandOfFree
Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-722371