“Water” abundance at the surface of C-complex main-belt asteroids
International audience Abstract : Recently published space-based observations of main-belt asteroids with the AKARI telescope provide a full description of the 3-μm band, related to the presence of OH bearing minerals. Here, we use laboratory spectra of carbonaceous chondrites obtained under control...
Published in: | Icarus |
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Main Authors: | , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-03098711 https://hal.science/hal-03098711/document https://hal.science/hal-03098711/file/S0019103520304681.pdf https://doi.org/10.1016/j.icarus.2020.114125 |
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Météo-France: HAL |
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English |
topic |
Water H2O main-belt asteroids 3-μm hydration band carbonaceous chondrites reflectance spectra m [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
spellingShingle |
Water H2O main-belt asteroids 3-μm hydration band carbonaceous chondrites reflectance spectra m [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] Beck, Pierre Eschrig, Jolantha Potin, Sandra Prestgard, Trygve Bonal, Lydie Quirico, Eric Schmitt, B “Water” abundance at the surface of C-complex main-belt asteroids |
topic_facet |
Water H2O main-belt asteroids 3-μm hydration band carbonaceous chondrites reflectance spectra m [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
description |
International audience Abstract : Recently published space-based observations of main-belt asteroids with the AKARI telescope provide a full description of the 3-μm band, related to the presence of OH bearing minerals. Here, we use laboratory spectra of carbonaceous chondrites obtained under controlled atmosphere (CI,CM,CO,CV,CR Tagish Lake) to derive spectral metrics related to the water content in the samples. After testing several spectral metrics, we use a combination of band depth at 2.75 μm and 2.80 μm that shows a correlation with [H2O] in the sample determined by TGA, though with a high uncertainty (4 wt. % H2O). This relation is used to determine water content at the surface of large Ccomplex main-belt asteroids and discuss the origin of the variability found. On average C-complex Main-Belt Asteroids (MBA) have water contents of 4.5 wt.% (volume average, (1) Ceres excluded), significantly lower than average CM chondrites. The estimated water content for the most hydrated asteroids are lower than those of the most hydrated meteorites, a difference that could be attributed to space-weathering. An anticorrelation is also present between water content and overall spectral slope, which is opposite to expectation from laboratory simulations of space weathering on dark carbonaceous chondrites. This suggests that part of the variability in the surface hydration among the different C-complex asteroids is not due to space-weathering, but to the composition of surface material. When applied to Ceres, the hygrometer presented in this work enables us to estimate that at least 1.22 wt. % of the hydrogen is present in the form of organics. This richness in organics strengthens the connection between Ceres and cometary materials. |
author2 |
Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France |
format |
Article in Journal/Newspaper |
author |
Beck, Pierre Eschrig, Jolantha Potin, Sandra Prestgard, Trygve Bonal, Lydie Quirico, Eric Schmitt, B |
author_facet |
Beck, Pierre Eschrig, Jolantha Potin, Sandra Prestgard, Trygve Bonal, Lydie Quirico, Eric Schmitt, B |
author_sort |
Beck, Pierre |
title |
“Water” abundance at the surface of C-complex main-belt asteroids |
title_short |
“Water” abundance at the surface of C-complex main-belt asteroids |
title_full |
“Water” abundance at the surface of C-complex main-belt asteroids |
title_fullStr |
“Water” abundance at the surface of C-complex main-belt asteroids |
title_full_unstemmed |
“Water” abundance at the surface of C-complex main-belt asteroids |
title_sort |
“water” abundance at the surface of c-complex main-belt asteroids |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03098711 https://hal.science/hal-03098711/document https://hal.science/hal-03098711/file/S0019103520304681.pdf https://doi.org/10.1016/j.icarus.2020.114125 |
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ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Tagish Tagish Lake |
geographic_facet |
Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://hal.science/hal-03098711 Icarus, 2020, 354, pp.114125. ⟨10.1016/j.icarus.2020.114125⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2011.00279 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2020.114125 hal-03098711 https://hal.science/hal-03098711 https://hal.science/hal-03098711/document https://hal.science/hal-03098711/file/S0019103520304681.pdf ARXIV: 2011.00279 doi:10.1016/j.icarus.2020.114125 PII: S0019-1035(20)30468-1 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.icarus.2020.114125 |
container_title |
Icarus |
container_volume |
357 |
container_start_page |
114125 |
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1801382778727563264 |
spelling |
ftmeteofrance:oai:HAL:hal-03098711v1 2024-06-09T07:49:53+00:00 “Water” abundance at the surface of C-complex main-belt asteroids Beck, Pierre Eschrig, Jolantha Potin, Sandra Prestgard, Trygve Bonal, Lydie Quirico, Eric Schmitt, B Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France 2020-10 https://hal.science/hal-03098711 https://hal.science/hal-03098711/document https://hal.science/hal-03098711/file/S0019103520304681.pdf https://doi.org/10.1016/j.icarus.2020.114125 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/arxiv/2011.00279 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2020.114125 hal-03098711 https://hal.science/hal-03098711 https://hal.science/hal-03098711/document https://hal.science/hal-03098711/file/S0019103520304681.pdf ARXIV: 2011.00279 doi:10.1016/j.icarus.2020.114125 PII: S0019-1035(20)30468-1 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://hal.science/hal-03098711 Icarus, 2020, 354, pp.114125. ⟨10.1016/j.icarus.2020.114125⟩ Water H2O main-belt asteroids 3-μm hydration band carbonaceous chondrites reflectance spectra m [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] info:eu-repo/semantics/article Journal articles 2020 ftmeteofrance https://doi.org/10.1016/j.icarus.2020.114125 2024-05-16T11:41:20Z International audience Abstract : Recently published space-based observations of main-belt asteroids with the AKARI telescope provide a full description of the 3-μm band, related to the presence of OH bearing minerals. Here, we use laboratory spectra of carbonaceous chondrites obtained under controlled atmosphere (CI,CM,CO,CV,CR Tagish Lake) to derive spectral metrics related to the water content in the samples. After testing several spectral metrics, we use a combination of band depth at 2.75 μm and 2.80 μm that shows a correlation with [H2O] in the sample determined by TGA, though with a high uncertainty (4 wt. % H2O). This relation is used to determine water content at the surface of large Ccomplex main-belt asteroids and discuss the origin of the variability found. On average C-complex Main-Belt Asteroids (MBA) have water contents of 4.5 wt.% (volume average, (1) Ceres excluded), significantly lower than average CM chondrites. The estimated water content for the most hydrated asteroids are lower than those of the most hydrated meteorites, a difference that could be attributed to space-weathering. An anticorrelation is also present between water content and overall spectral slope, which is opposite to expectation from laboratory simulations of space weathering on dark carbonaceous chondrites. This suggests that part of the variability in the surface hydration among the different C-complex asteroids is not due to space-weathering, but to the composition of surface material. When applied to Ceres, the hygrometer presented in this work enables us to estimate that at least 1.22 wt. % of the hydrogen is present in the form of organics. This richness in organics strengthens the connection between Ceres and cometary materials. Article in Journal/Newspaper Tagish Météo-France: HAL Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) Icarus 357 114125 |