학술논문
THERMAP: a mid-infrared spectro-imager for space missions to small bodies in the inner solar system
Document Type
Working Paper
Author
Groussin, O.; Licandro, J.; Helbert, J.; Reynaud, J. -L.; Levacher, P.; García-Talavera, M. Reyes; Alí-Lagoa, V.; Blanc, P. -E.; Brageot, E.; Davidsson, B.; Delbó, M.; Deleuze, M.; Delsanti, A.; Garcia, J. J. Diaz; Dohlen, K.; Ferrand, D.; Green, S.; Jorda, L.; Álvarez, E. Joven; Knollenberg, J.; Kührt, E.; Lamy, P.; Lellouch, E.; Merrer, J. Le; Marty, B.; Mas, G.; Rossin, C.; Rozitis, B.; Sunshine, J.; Vernazza, P.; Vives, S.
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Subject
Language
Abstract
We present THERMAP, a mid-infrared (8-16 {\mu}m) spectro-imager for space missions to small bodies in the inner solar system, developed in the framework of the MarcoPolo-R asteroid sample return mission. THERMAP is very well suited to characterize the surface thermal environment of a NEO and to map its surface composition. The instrument has two channels, one for imaging and one for spectroscopy: it is both a thermal camera with full 2D imaging capabilities and a slit spectrometer. THERMAP takes advantage of the recent technological developments of uncooled microbolometers detectors, sensitive in the mid-infrared spectral range. THERMAP can acquire thermal images (8-18 {\mu}m) of the surface and perform absolute temperature measurements with a precision better than 3.5 K above 200 K. THERMAP can acquire mid-infrared spectra (8-16 {\mu}m) of the surface with a spectral resolution {\Delta}{\lambda} of 0.3 {\mu}m. For surface temperatures above 350 K, spectra have a signal-to-noise ratio >60 in the spectral range 9-13 {\mu}m where most emission features occur.
Comment: 21 pages, 12 figures, 3 tables; Experimental Astronomy: in press
Comment: 21 pages, 12 figures, 3 tables; Experimental Astronomy: in press