| Issue |
EAS Publications Series
Volume 58, 2012
ECLA - European Conference on Laboratory Astrophysics
|
|
|---|---|---|
| Page(s) | 405 - 408 | |
| DOI | https://doi.org/10.1051/eas/1258069 | |
| Published online | 13 February 2013 | |
C. Stehlé, C. Joblin and L. d’Hendecourt (eds)
EAS Publications Series, 58 (2012) 405-408
Variation of the FIR/submm optical properties of silicate dust analogues at low temperature: implications for the observations of interstellar cold dust emission
1 Université de Toulouse,
UPS-OMP, IRAP,
Toulouse,
France
2 CNRS, IRAP, 9 avenue colonel Roche, BP. 44346,
31028
Toulouse Cedex 4,
France
3 Université de Toulouse, INSA, CNRS,
LPCNO,
31077
Toulouse,
France
4 UMET, UMR 8207, Université Lille 1,
CNRS, 59655 Villeneuve
d’ Ascq,
France
5 Ligne AILES – Synchrotron SOLEIL,
L’Orme des Merisiers, 91192
Gif-sur-Yvette,
France
We present here the latest results from experimental studies aiming at measuring the Mass Absorption Coefficient (MAC) of interstellar silicate dust analogues at low temperatures in the far infrared and submillimetre domains which are necessary for the analysis of astronomical data. These results show that above 100 μm, the MAC of amorphous silicate nano-grains has a complex dependence with the grain temperature and with the wavelength. This has to be considered when interpreting astronomical observations to avoid errors on the derived parameters such as the dust mass and its physical and chemical properties.
© The Author(s) 2013