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Iapetus: Unique Surface Properties and a Global Color Dichotomy from Cassini Imaging

Denk, Tilmann and Neukum , Gerhard and Roatsch, Thomas and Porco, carolyn and Burns, Joseph and Galuba, Goetz and Schmedemann, Nico and Helfenstein, Paul and Thomas, Peter and Wagner, Roland and West, Robert (2010) Iapetus: Unique Surface Properties and a Global Color Dichotomy from Cassini Imaging. Science, 327 (5964), pp. 435-439. American Association for the Advancement of Science (AAAS). doi: 10.1126/science.1177088.

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Since 2004, Saturn’s moon Iapetus has been observed repeatedly with the Imaging Science Subsystem of the Cassini spacecraft. The images show numerous impact craters down to the resolution limit of ~10 meters per pixel. Small, bright craters within the dark hemisphere indicate a dark blanket thickness on the order of meters or less. Dark, equator-facing and bright, poleward-facing crater walls suggest temperature-driven water-ice sublimation as the process responsible for local albedo patterns. Imaging data also reveal a global color dichotomy, wherein both dark and bright materials on the leading side have a substantially redder color than the respective trailing-side materials. This global pattern indicates an exogenic origin for the redder leading-side parts and suggests that the global color dichotomy initiated the thermal formation of the global albedo dichotomy.

Item URL in elib:https://elib.dlr.de/62925/
Document Type:Article
Title:Iapetus: Unique Surface Properties and a Global Color Dichotomy from Cassini Imaging
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Denk, TilmannFU BerlinUNSPECIFIED
Neukum , GerhardFU BerlinUNSPECIFIED
Porco, carolynSpace Science Institute, BoulderUNSPECIFIED
Burns, JosephCornellUNSPECIFIED
Galuba, GoetzFU BerlinUNSPECIFIED
Schmedemann, NicoFU BerlinUNSPECIFIED
Helfenstein, PaulCornellUNSPECIFIED
Thomas, PeterCornellUNSPECIFIED
Date:22 January 2010
Journal or Publication Title:Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1126/science.1177088
Page Range:pp. 435-439
Publisher:American Association for the Advancement of Science (AAAS)
Keywords:Cassini, Iapetus, Saturnian Satellites
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Roatsch, Dr.rer.nat. Thomas
Deposited On:26 Jan 2010 11:22
Last Modified:08 Mar 2018 18:50

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