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Photometric modelling and VIS-IR albedo maps of Rhea from Cassini-VIMS

Filacchione, G. and Ciarnello, M. and D'Aversa, E. and Capacchioni, F. and Cerroni, P. and Buratti, B and Clark, R. N. and Stephan, Katrin and Plainaki, C. (2020) Photometric modelling and VIS-IR albedo maps of Rhea from Cassini-VIMS. Monthly Notices of the Royal Astronomical Society: Letters, 499, L62-L66. Oxford University Press. doi: 10.1093/mnrasl/slaa162. ISSN 1745-3925.

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Official URL: https://academic.oup.com/mnrasl/article/499/1/L62/5905424

Abstract

Photometric correction based on the Shkuratov method is applied to derive visible and infrared albedo maps of Rhea from disc-resolved Cassini VIMS data. Differently from I/F images, albedo maps offer an optimal disentanglement of composition and physical properties of the surface from illumination-viewing effects and to study spectral variations occurring at hemispherical and local scales. A similar methodology has been already applied to Dione’s and Tethys’s data sets returned by VIMS. Following the same scheme also for Rhea, spectral albedo is derived at 59 wavelengths between 0.35 and 5.047 µm. Equigonal albedo maps are rendered in cylindrical projection with a 0.5∘× 0.5° angular resolution in latitude and longitude, corresponding to a maximum spatial resolution of 6.7 km bin−1. Apart from albedo, 0.35–0.55 and 0.55–0.95 µm spectral slopes and the water ice 1.5–2.0 µm band depth maps are computed from photometric-corrected data with the specific scope to investigate the leading-trailing hemisphere colour-albedo dichotomy and to constrain spectral properties above different morphological units including fresh craters (Inktomi) and bright tectonics features (Wakonda-Avaiki Chasmata).

Item URL in elib:https://elib.dlr.de/139455/
Document Type:Article
Title:Photometric modelling and VIS-IR albedo maps of Rhea from Cassini-VIMS
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Filacchione, G.Istituto Fisica Spazio Interplanetario, CNR, Roma, ItalyUNSPECIFIED
Ciarnello, M.inaf-iasf, italyUNSPECIFIED
D'Aversa, E.INAF-IFSI, Istituto di Fisica dello Spazio Interplanetario, Rome, ItalyUNSPECIFIED
Capacchioni, F.INAF-IASF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Rome, ItalyUNSPECIFIED
Cerroni, P.Istituto di Astrofisica Spaziale CNR, Viale dell’Università 11, 00185 Rome, ItalyUNSPECIFIED
Buratti, BJet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Clark, R. N.U.S. Geological Survey, Denver, USAUNSPECIFIED
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Plainaki, C.INAF-IAPS Istituto di Astrofisica e Planetologia Spaziali, Rome, ItalyUNSPECIFIED
Date:2020
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society: Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:499
DOI :10.1093/mnrasl/slaa162
Page Range:L62-L66
Publisher:Oxford University Press
ISSN:1745-3925
Status:Published
Keywords:Cassini VIMS Rhea
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Projekt JUICE (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Stephan, Dr.rer.nat. Katrin
Deposited On:10 Dec 2020 07:22
Last Modified:10 Dec 2020 07:22

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