Speaker
Pierre Mohr
(Friedrich Schiller University Jena)
Description
P. Mohr, F. Lewen, H. Mutschke
In this project, we have synthesized glassy Mg-Fe silicates as interstellar-dust analog materials and have determined their absorption/emission coefficients at low temperatures in the wavelength range from 50 micrometers to 4 millimeters. We have found a strong dependence of the dust opacity on the temperature and a moderate depencence on the chemical composition, i.e. the content of divalent and trivalent iron. A dependence on the grain size is also detected, which could point to an influence of additional defects created by milling. In the new project phase, we will continue with similar measurements on carbonaceous materials.
Author
Pierre Mohr
(Friedrich Schiller University Jena)