Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface
International audience A multiwavelength regionally dependent photometric analysis of Pluto's anti-Charon-facing hemisphere using images collected by New Horizons' Multispectral Visible Imaging Camera (MVIC) reveals large variations in the absolute value and spectral slope of the single-sc...
Published in: | The Astronomical Journal |
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Main Authors: | , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://insu.hal.science/insu-02468367 https://doi.org/10.3847/1538-3881/ab5e82 |
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ftmeteofrance:oai:HAL:insu-02468367v1 |
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English |
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[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Protopapa, Silvia Olkin, Cathy B. Grundy, Will M. Li, Jian-Yang Verbiscer, Anne Cruikshank, Dale P. Gautier, Thomas Quirico, Eric Cook, Jason C. Reuter, Dennis Howett, Carly J. A. Stern, Alan Beyer, Ross A. Porter, Simon Young, Leslie A. Weaver, Hal A. Ennico, Kim Dalle Ore, Cristina M. Scipioni, Francesca Singer, Kelsi Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience A multiwavelength regionally dependent photometric analysis of Pluto's anti-Charon-facing hemisphere using images collected by New Horizons' Multispectral Visible Imaging Camera (MVIC) reveals large variations in the absolute value and spectral slope of the single-scattering albedo. Four regions of interest are analyzed: the dark equatorial belt, Pluto's north pole, nitrogen-rich regions, and the mid-latitude terrains. Regions dominated by volatile ices such as Lowell Regio and Sputnik Planitia present single-scattering albedos of ~0.98 at 492 nm, almost neutral across MVIC's visible wavelength range (400–910 nm), indicating limited contributions from tholin materials. Pluto's dark equatorial regions, informally named Cthulhu and Krun Maculae, have single-scattering albedos of ~0.16 at 492 nm and are the reddest regions. Applying the Hapke radiative transfer model to combined MVIC and Linear Etalon Imaging Spectral Array (LEISA) spectra (400–2500 nm) of Cthulhu Macula and Lowell Regio successfully reproduces the spectral properties of these two regions of dramatically disparate coloration, composition, and morphology. Since this model uses only a single coloring agent, very similar to the Titan-like tholin of Khare et al., to account for all of Pluto's colors, this result supports the Grundy et al. conclusion that Pluto's coloration is the result of photochemical products mostly produced in the atmosphere. Although cosmic rays and extreme ultraviolet photons reach Pluto's surface where they can drive chemical processing, observations of diverse surface colors do not require different chemical products produced in different environments. We report a correction scaling factor in the LEISA radiometric calibration of 0.74 ± 0.05. |
author2 |
Southwest Research Institute Boulder (SwRI) Lowell Observatory Flagstaff Planetary Science Institute Tucson (PSI) University of Virginia NASA Ames Research Center (ARC) PLANETO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 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 Pinhead Institute Smithsonian Institution NASA Goddard Space Flight Center (GSFC) Search for Extraterrestrial Intelligence Institute (SETI) Johns Hopkins University Applied Physics Laboratory Laurel, MD (APL) |
format |
Article in Journal/Newspaper |
author |
Protopapa, Silvia Olkin, Cathy B. Grundy, Will M. Li, Jian-Yang Verbiscer, Anne Cruikshank, Dale P. Gautier, Thomas Quirico, Eric Cook, Jason C. Reuter, Dennis Howett, Carly J. A. Stern, Alan Beyer, Ross A. Porter, Simon Young, Leslie A. Weaver, Hal A. Ennico, Kim Dalle Ore, Cristina M. Scipioni, Francesca Singer, Kelsi |
author_facet |
Protopapa, Silvia Olkin, Cathy B. Grundy, Will M. Li, Jian-Yang Verbiscer, Anne Cruikshank, Dale P. Gautier, Thomas Quirico, Eric Cook, Jason C. Reuter, Dennis Howett, Carly J. A. Stern, Alan Beyer, Ross A. Porter, Simon Young, Leslie A. Weaver, Hal A. Ennico, Kim Dalle Ore, Cristina M. Scipioni, Francesca Singer, Kelsi |
author_sort |
Protopapa, Silvia |
title |
Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface |
title_short |
Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface |
title_full |
Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface |
title_fullStr |
Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface |
title_full_unstemmed |
Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface |
title_sort |
disk-resolved photometric properties of pluto and the coloring materials across its surface |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://insu.hal.science/insu-02468367 https://doi.org/10.3847/1538-3881/ab5e82 |
long_lat |
ENVELOPE(66.167,66.167,-70.833,-70.833) |
geographic |
North Pole Sputnik |
geographic_facet |
North Pole Sputnik |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
ISSN: 0004-6256 EISSN: 1538-3881 The Astronomical Journal https://insu.hal.science/insu-02468367 The Astronomical Journal, 2020, 159 (2), pp.74. ⟨10.3847/1538-3881/ab5e82⟩ |
op_relation |
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op_doi |
https://doi.org/10.3847/1538-3881/ab5e82 |
container_title |
The Astronomical Journal |
container_volume |
159 |
container_issue |
2 |
container_start_page |
74 |
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1801380171205312512 |
spelling |
ftmeteofrance:oai:HAL:insu-02468367v1 2024-06-09T07:48:27+00:00 Disk-resolved Photometric Properties of Pluto and the Coloring Materials across its Surface Protopapa, Silvia Olkin, Cathy B. Grundy, Will M. Li, Jian-Yang Verbiscer, Anne Cruikshank, Dale P. Gautier, Thomas Quirico, Eric Cook, Jason C. Reuter, Dennis Howett, Carly J. A. Stern, Alan Beyer, Ross A. Porter, Simon Young, Leslie A. Weaver, Hal A. Ennico, Kim Dalle Ore, Cristina M. Scipioni, Francesca Singer, Kelsi Southwest Research Institute Boulder (SwRI) Lowell Observatory Flagstaff Planetary Science Institute Tucson (PSI) University of Virginia NASA Ames Research Center (ARC) PLANETO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 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 Pinhead Institute Smithsonian Institution NASA Goddard Space Flight Center (GSFC) Search for Extraterrestrial Intelligence Institute (SETI) Johns Hopkins University Applied Physics Laboratory Laurel, MD (APL) 2020-02-01 https://insu.hal.science/insu-02468367 https://doi.org/10.3847/1538-3881/ab5e82 en eng HAL CCSD American Astronomical Society info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/ab5e82 insu-02468367 https://insu.hal.science/insu-02468367 doi:10.3847/1538-3881/ab5e82 ISSN: 0004-6256 EISSN: 1538-3881 The Astronomical Journal https://insu.hal.science/insu-02468367 The Astronomical Journal, 2020, 159 (2), pp.74. ⟨10.3847/1538-3881/ab5e82⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftmeteofrance https://doi.org/10.3847/1538-3881/ab5e82 2024-05-16T11:58:04Z International audience A multiwavelength regionally dependent photometric analysis of Pluto's anti-Charon-facing hemisphere using images collected by New Horizons' Multispectral Visible Imaging Camera (MVIC) reveals large variations in the absolute value and spectral slope of the single-scattering albedo. Four regions of interest are analyzed: the dark equatorial belt, Pluto's north pole, nitrogen-rich regions, and the mid-latitude terrains. Regions dominated by volatile ices such as Lowell Regio and Sputnik Planitia present single-scattering albedos of ~0.98 at 492 nm, almost neutral across MVIC's visible wavelength range (400–910 nm), indicating limited contributions from tholin materials. Pluto's dark equatorial regions, informally named Cthulhu and Krun Maculae, have single-scattering albedos of ~0.16 at 492 nm and are the reddest regions. Applying the Hapke radiative transfer model to combined MVIC and Linear Etalon Imaging Spectral Array (LEISA) spectra (400–2500 nm) of Cthulhu Macula and Lowell Regio successfully reproduces the spectral properties of these two regions of dramatically disparate coloration, composition, and morphology. Since this model uses only a single coloring agent, very similar to the Titan-like tholin of Khare et al., to account for all of Pluto's colors, this result supports the Grundy et al. conclusion that Pluto's coloration is the result of photochemical products mostly produced in the atmosphere. Although cosmic rays and extreme ultraviolet photons reach Pluto's surface where they can drive chemical processing, observations of diverse surface colors do not require different chemical products produced in different environments. We report a correction scaling factor in the LEISA radiometric calibration of 0.74 ± 0.05. Article in Journal/Newspaper North Pole Météo-France: HAL North Pole Sputnik ENVELOPE(66.167,66.167,-70.833,-70.833) The Astronomical Journal 159 2 74 |