Photometry of meteorites
International audience We have measured the bi-directional reflectance phase function on selected meteorite samples (1 howardite, 1 eucrite, 1 diogenite, Orgeuil (CI), Tagish Lake (CC), Allende (CV), Lunar meteorite (MAC 88105), Forest Vale (H4)) covering part of the geochemical and petrologic diver...
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Main Authors: | , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://insu.hal.science/insu-00700347 https://doi.org/10.1016/j.icarus.2011.12.005 |
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ftunivsavoie:oai:HAL:insu-00700347v1 |
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Université Savoie Mont Blanc: HAL |
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English |
topic |
Asteroids Photometry Meteorites Spectroscopy Mineralogy [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
spellingShingle |
Asteroids Photometry Meteorites Spectroscopy Mineralogy [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy Beck, P. Pommerol, A. Thomas, N. Schmitt, B. Moynier, F. Barrat, Jean-Alix, J-A Photometry of meteorites |
topic_facet |
Asteroids Photometry Meteorites Spectroscopy Mineralogy [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
description |
International audience We have measured the bi-directional reflectance phase function on selected meteorite samples (1 howardite, 1 eucrite, 1 diogenite, Orgeuil (CI), Tagish Lake (CC), Allende (CV), Lunar meteorite (MAC 88105), Forest Vale (H4)) covering part of the geochemical and petrologic diversity expected for asteroid surfaces. Samples were measured as powders, for which we achieved reflectance measurements from phase angles down to 3°, and up to 150°, at five different wavelengths covering the VIS-NIR spectral region. The data were fitted by the photometric model of Hapke (Hapke, B. [1993]. Theory of reflectance and emittance spectroscopy. Cambridge University Press, Cambridge). The physical sense of the retrieved Hapke's parameters seems unclear but they permit to interpolate the data to any observation geometry. Strong opposition effects were observed for all samples. The absolute intensity of this effect appears moderately variable among our sample suite, and is not correlated with the average sample reflectance. We interpret this observation as Shadow-Hiding Opposition Effect (SHOE). In the case of samples presenting intense absorption bands (the Fe crystal field band at 1 μm of HED and the ordinary chondrite), we observe significant dependence of band depth to phase angle, up to 70°, even for moderate variation of phase angle. In addition, a general trend of spectral reddening with phase angle is observed. This reddening, linear with phase angle, is present in all meteorites studied. This behavior is not predicted by classical radiative theories. We propose that small-scale roughness (of the order of or below the wavelength) may induce such a behavior. |
author2 |
Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) Physikalisches Institut Bern Universität Bern = University of Bern = Université de Berne (UNIBE) McDonnell Center for Space Sciences Washington University in Saint Louis (WUSTL) Department of Earth and Planetary Sciences St Louis Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Beck, P. Pommerol, A. Thomas, N. Schmitt, B. Moynier, F. Barrat, Jean-Alix, J-A |
author_facet |
Beck, P. Pommerol, A. Thomas, N. Schmitt, B. Moynier, F. Barrat, Jean-Alix, J-A |
author_sort |
Beck, P. |
title |
Photometry of meteorites |
title_short |
Photometry of meteorites |
title_full |
Photometry of meteorites |
title_fullStr |
Photometry of meteorites |
title_full_unstemmed |
Photometry of meteorites |
title_sort |
photometry of meteorites |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://insu.hal.science/insu-00700347 https://doi.org/10.1016/j.icarus.2011.12.005 |
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Tagish |
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Tagish |
op_source |
ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://insu.hal.science/insu-00700347 Icarus, 2012, 218 (18), pp.364-377. ⟨10.1016/j.icarus.2011.12.005⟩ |
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https://doi.org/10.1016/j.icarus.2011.12.005 |
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218 |
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ftunivsavoie:oai:HAL:insu-00700347v1 2024-09-15T18:38:30+00:00 Photometry of meteorites Beck, P. Pommerol, A. Thomas, N. Schmitt, B. Moynier, F. Barrat, Jean-Alix, J-A Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) Physikalisches Institut Bern Universität Bern = University of Bern = Université de Berne (UNIBE) McDonnell Center for Space Sciences Washington University in Saint Louis (WUSTL) Department of Earth and Planetary Sciences St Louis Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) 2012-03-15 https://insu.hal.science/insu-00700347 https://doi.org/10.1016/j.icarus.2011.12.005 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2011.12.005 insu-00700347 https://insu.hal.science/insu-00700347 doi:10.1016/j.icarus.2011.12.005 ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://insu.hal.science/insu-00700347 Icarus, 2012, 218 (18), pp.364-377. ⟨10.1016/j.icarus.2011.12.005⟩ Asteroids Photometry Meteorites Spectroscopy Mineralogy [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy info:eu-repo/semantics/article Journal articles 2012 ftunivsavoie https://doi.org/10.1016/j.icarus.2011.12.005 2024-07-29T23:40:13Z International audience We have measured the bi-directional reflectance phase function on selected meteorite samples (1 howardite, 1 eucrite, 1 diogenite, Orgeuil (CI), Tagish Lake (CC), Allende (CV), Lunar meteorite (MAC 88105), Forest Vale (H4)) covering part of the geochemical and petrologic diversity expected for asteroid surfaces. Samples were measured as powders, for which we achieved reflectance measurements from phase angles down to 3°, and up to 150°, at five different wavelengths covering the VIS-NIR spectral region. The data were fitted by the photometric model of Hapke (Hapke, B. [1993]. Theory of reflectance and emittance spectroscopy. Cambridge University Press, Cambridge). The physical sense of the retrieved Hapke's parameters seems unclear but they permit to interpolate the data to any observation geometry. Strong opposition effects were observed for all samples. The absolute intensity of this effect appears moderately variable among our sample suite, and is not correlated with the average sample reflectance. We interpret this observation as Shadow-Hiding Opposition Effect (SHOE). In the case of samples presenting intense absorption bands (the Fe crystal field band at 1 μm of HED and the ordinary chondrite), we observe significant dependence of band depth to phase angle, up to 70°, even for moderate variation of phase angle. In addition, a general trend of spectral reddening with phase angle is observed. This reddening, linear with phase angle, is present in all meteorites studied. This behavior is not predicted by classical radiative theories. We propose that small-scale roughness (of the order of or below the wavelength) may induce such a behavior. Article in Journal/Newspaper Tagish Université Savoie Mont Blanc: HAL Icarus 218 1 364 377 |