Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21734905c&link_type=abstract
American Astronomical Society, AAS Meeting #217, #349.05; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Radiative transfer models require accurate optical properties of the materials present in the simulation. However, many commonly used sets of optical properties are decades old, obtained using instruments of lower resolution to what is possible today. Additionally, if one requires these optical properties over a large range (such as UV-VIS to mid-IR), it is necessary to combine several different data sets, each taken using different instruments and samples. This can make it difficult to combine these different data sets in a consistent manner; there are also some inconsistencies between different data sets even over the same range. Using reflectance measurements calibrated against a standard, we have obtained optical properties for graphite and iron in a range extending from the UV-VIS to the mid-IR at ambient temperature. We used only two instruments to cover this range, allowing us to more easily combine data sets; also, the same samples were used for the entire range, allowing us to eliminate some of the uncertainties in previous measurements. Data acquisition at lower frequencies and temperatures are planned.
Corman Adrian
Hofmeister Anne
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