Characterization of OSIRIS NAC filters for the interpretation of multispectral data of comet 67P/Churyumov-Gerasimenko

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101634

Title:	Characterization of OSIRIS NAC filters for the interpretation of multispectral data of comet 67P/Churyumov-Gerasimenko
Authors:	葉永烜;Oklay, N.;Vincent, J.-B.;Sierks, H.;Besse, S.;Pajola, M.;Bertini, I.;Rickman, H.;La Forgia, F.;Barucci, A. M.;Fornasier, S.;Barbieri, C.;Koschny, D.;Lamy, P. L.;Rodrigo, R.;Agarwal, J.;A’Hearn, M. F.;Bertaux, J.-L.;Cremonese, G.;Da Deppo, V.;Davidsson, B.;Debei, S.;De Cecco, M.;Fulle, M.;Groussin, O.;Gutiérrez, P. J.;Güttler, C.;Hviid, S. F.;Ip, W.-H.;Jorda, L.;Keller, H. U.;Knollenberg, J.;Kramm, J.-R.;Kührt, E.;Küppers, M.;Lara, L. M.;Lazzarin, M.;Lopez-Moreno, J. J.;Marzari, F.;Michalik, H.;Naletto, G.;Thomas, N.;Tubiana, C.
Contributors:	理學院天文研究所
Keywords:	Astrophysics;Band spectra;Camber;Color;Comets;comets: individual: 67P/Churyumov-Gerasimenko;Instrumentation and Methods for Astrophysic;methods: data analysis;Physics;Reflectance;Sciences of the Universe;Solar and Stellar Astrophysics;Spectra;techniques: imaging spectroscopy;Tilt
Date:	2015-11-01
Issue Date:	2026-04-21 14:39:38 (UTC+8)
Publisher:	EDP Sciences
Abstract:	摘要： Context. We interpret multicolor data from OSIRISNAC for the remote-sensing exploration of comet 67P/Churyumov-Gerasimenko. Aims. We determine the most meaningful definition of color maps for the characterization of surface variegation with filters available on OSIRIS NAC. Methods. We analyzed laboratory spectra of selected minerals and olivine-pyroxene mixtures seen through OSIRIS NAC filters, with spectral methods existing in the literature: reflectance ratios, minimum band wavelength, spectral slopes, band tilt, band curvature, and visible tilt. Results. We emphasize the importance of reflectance ratios and particularly the relation of visible tilt vs. band tilt. This technique provides a reliable diagnostic of the presence of silicates. Color maps constructed by red-green-blue colors defined with the green, orange, red, IR, and Fe2O3 filters let us define regions that may significantly differ in composition. 出版者： EDP Sciences 出版日期： 2015-11-01 出處： Astronomy and astrophysics (Berlin), 2015-11, Vol.583, p.A45 資源來源： EDP Sciences 版權： licence_http://creativecommons.org/publicdomain/zero 識別號： ISSN: 0004-6361 識別號： ISSN: 1432-0746 識別號： EISSN: 1432-0746 識別號： DOI: 10.1051/0004-6361/201525994
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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