| タイトル | Thermal Emission Spectra of Mercury |
| 著者（英） | Cooper, B. L.; Killen, R. M.; Morgan, T. H.; Potter, A. E. |
| 著者所属（英） | NASA |
| 発行日 | 1999-01-01
1999 |
| 言語 | eng |
| 内容記述 | The emission spectrum of Mercury may hold clues as to the mineral composition of the surface from reststrahlen bands. Unfortunately, these bands are very weak in finely powdered materials, such as are expected on the mercurian surface, and they lie in a region of the spectrum where there are substantial atmospheric absorptions. We have been measuring the 8-14-micron spectra of Mercury and the Sun at a resolution of about 0.03 wavenumbers, using the Fourier Transform Spectrometer (FTS) located at the National Solar Observatory, Kitt Peak, Arizona. The objective of using such a high resolution for the measurement is to be able to look between atmospheric absorption lines as much as possible. The atmospheric effects are largely cancelled by ratioing Mercury spectra to Sun spectra taken at nearly the same airmass, although small differences in airmass produce some residual atmospheric absorptions in the ratio spectra. We expect that spectral features of Mercury, if any, should appear in the ratio spectra, since the 8-14 micron spectrum of the Sun approximates a black body. |
| NASA分類 | Lunar and Planetary Exploration |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/343069 |
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