A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN
International audience Cassini/VIMS T85 observations of a solar specular reflection off of Kivu Lacus (87. • 4N 241. • 1E) provide an empirical transmission spectrum of Titan's atmosphere. Because this observation was acquired from short range (33,000 km), its intensity makes it visible within...
Published in: | The Astrophysical Journal |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2013
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Subjects: | |
Online Access: | https://u-paris.hal.science/hal-03657809 https://u-paris.hal.science/hal-03657809/document https://u-paris.hal.science/hal-03657809/file/2013.11.ApJ.Barnes.SpecularTransmission.pdf https://doi.org/10.1088/0004-637x/777/2/161 |
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ftunigrenoble:oai:HAL:hal-03657809v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
planets and satellites individual (Titan) -radiative transfer -techniques spectroscopic [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
spellingShingle |
planets and satellites individual (Titan) -radiative transfer -techniques spectroscopic [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] Barnes, Jason Clark, Roger Sotin, Christophe Ádámkovics, Máté Appéré, Thomas Rodriguez, Sebastien Soderblom, Jason Brown, Robert Buratti, Bonnie Baines, Kevin Le Mouélic, Stéphane Nicholson, Philip A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN |
topic_facet |
planets and satellites individual (Titan) -radiative transfer -techniques spectroscopic [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
description |
International audience Cassini/VIMS T85 observations of a solar specular reflection off of Kivu Lacus (87. • 4N 241. • 1E) provide an empirical transmission spectrum of Titan's atmosphere. Because this observation was acquired from short range (33,000 km), its intensity makes it visible within the 2.0, 2.7, and 2.8 μm atmospheric windows in addition to the 5 μm window where all previous specular reflections have been seen. The resulting measurement of the total one-way normal atmospheric optical depth (corresponding to haze scattering plus haze and gas absorption) provides strong empirical constraints on radiative transfer models. Using those models, we find that the total haze column abundance in our observation is 20% higher than the Huygens equatorial value. Ours is the first measurement in the 2-5 μm wavelength range that probes all the way to the surface in Titan's arctic, where the vast majority of surface liquids are located. The specular technique complements other probes of atmospheric properties such as solar occultations and the direct measurements from Huygens. In breaking the degeneracy between surface and atmospheric absorptions, our measured optical depths will help to drive future calculations of deconvolved surface albedo spectra. |
author2 |
University of Idaho Moscow, USA Planetary Science Institute Tucson (PSI) Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Department of Astronomy Berkeley University of California Berkeley (UC Berkeley) University of California (UC)-University of California (UC) 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) University of Arizona New York Presbyterian Hospital Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Astronomy Ithaca Cornell University New York |
format |
Article in Journal/Newspaper |
author |
Barnes, Jason Clark, Roger Sotin, Christophe Ádámkovics, Máté Appéré, Thomas Rodriguez, Sebastien Soderblom, Jason Brown, Robert Buratti, Bonnie Baines, Kevin Le Mouélic, Stéphane Nicholson, Philip |
author_facet |
Barnes, Jason Clark, Roger Sotin, Christophe Ádámkovics, Máté Appéré, Thomas Rodriguez, Sebastien Soderblom, Jason Brown, Robert Buratti, Bonnie Baines, Kevin Le Mouélic, Stéphane Nicholson, Philip |
author_sort |
Barnes, Jason |
title |
A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN |
title_short |
A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN |
title_full |
A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN |
title_fullStr |
A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN |
title_full_unstemmed |
A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN |
title_sort |
transmission spectrum of titan's north polar atmosphere from a specular reflection of the sun |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://u-paris.hal.science/hal-03657809 https://u-paris.hal.science/hal-03657809/document https://u-paris.hal.science/hal-03657809/file/2013.11.ApJ.Barnes.SpecularTransmission.pdf https://doi.org/10.1088/0004-637x/777/2/161 |
long_lat |
ENVELOPE(33.629,33.629,67.560,67.560) |
geographic |
Arctic Titan |
geographic_facet |
Arctic Titan |
genre |
albedo Arctic |
genre_facet |
albedo Arctic |
op_source |
ISSN: 0004-637X EISSN: 1538-4357 The Astrophysical Journal https://u-paris.hal.science/hal-03657809 The Astrophysical Journal, 2013, 777, ⟨10.1088/0004-637x/777/2/161⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637x/777/2/161 hal-03657809 https://u-paris.hal.science/hal-03657809 https://u-paris.hal.science/hal-03657809/document https://u-paris.hal.science/hal-03657809/file/2013.11.ApJ.Barnes.SpecularTransmission.pdf doi:10.1088/0004-637x/777/2/161 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1088/0004-637x/777/2/161 |
container_title |
The Astrophysical Journal |
container_volume |
777 |
container_issue |
2 |
container_start_page |
161 |
_version_ |
1798835093858418688 |
spelling |
ftunigrenoble:oai:HAL:hal-03657809v1 2024-05-12T07:52:24+00:00 A TRANSMISSION SPECTRUM OF TITAN'S NORTH POLAR ATMOSPHERE FROM A SPECULAR REFLECTION OF THE SUN Barnes, Jason Clark, Roger Sotin, Christophe Ádámkovics, Máté Appéré, Thomas Rodriguez, Sebastien Soderblom, Jason Brown, Robert Buratti, Bonnie Baines, Kevin Le Mouélic, Stéphane Nicholson, Philip University of Idaho Moscow, USA Planetary Science Institute Tucson (PSI) Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Department of Astronomy Berkeley University of California Berkeley (UC Berkeley) University of California (UC)-University of California (UC) 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) University of Arizona New York Presbyterian Hospital Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Astronomy Ithaca Cornell University New York 2013-10-24 https://u-paris.hal.science/hal-03657809 https://u-paris.hal.science/hal-03657809/document https://u-paris.hal.science/hal-03657809/file/2013.11.ApJ.Barnes.SpecularTransmission.pdf https://doi.org/10.1088/0004-637x/777/2/161 en eng HAL CCSD American Astronomical Society info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637x/777/2/161 hal-03657809 https://u-paris.hal.science/hal-03657809 https://u-paris.hal.science/hal-03657809/document https://u-paris.hal.science/hal-03657809/file/2013.11.ApJ.Barnes.SpecularTransmission.pdf doi:10.1088/0004-637x/777/2/161 info:eu-repo/semantics/OpenAccess ISSN: 0004-637X EISSN: 1538-4357 The Astrophysical Journal https://u-paris.hal.science/hal-03657809 The Astrophysical Journal, 2013, 777, ⟨10.1088/0004-637x/777/2/161⟩ planets and satellites individual (Titan) -radiative transfer -techniques spectroscopic [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] info:eu-repo/semantics/article Journal articles 2013 ftunigrenoble https://doi.org/10.1088/0004-637x/777/2/161 2024-04-18T03:06:21Z International audience Cassini/VIMS T85 observations of a solar specular reflection off of Kivu Lacus (87. • 4N 241. • 1E) provide an empirical transmission spectrum of Titan's atmosphere. Because this observation was acquired from short range (33,000 km), its intensity makes it visible within the 2.0, 2.7, and 2.8 μm atmospheric windows in addition to the 5 μm window where all previous specular reflections have been seen. The resulting measurement of the total one-way normal atmospheric optical depth (corresponding to haze scattering plus haze and gas absorption) provides strong empirical constraints on radiative transfer models. Using those models, we find that the total haze column abundance in our observation is 20% higher than the Huygens equatorial value. Ours is the first measurement in the 2-5 μm wavelength range that probes all the way to the surface in Titan's arctic, where the vast majority of surface liquids are located. The specular technique complements other probes of atmospheric properties such as solar occultations and the direct measurements from Huygens. In breaking the degeneracy between surface and atmospheric absorptions, our measured optical depths will help to drive future calculations of deconvolved surface albedo spectra. Article in Journal/Newspaper albedo Arctic Université Grenoble Alpes: HAL Arctic Titan ENVELOPE(33.629,33.629,67.560,67.560) The Astrophysical Journal 777 2 161 |