High-resolution Ceres High Altitude Mapping Orbit atlas derived from Dawn Framing Camera images

Roatsch, Thomas; Kersten, Elke; Matz, Klaus-Dieter; Preusker, Frank; Scholten, F.; Jaumann, R.; Raymond, C. A.; Russell, C. T.

doi:10.1016/j.pss.2016.05.011

Cited by 58 publications

(53 citation statements)

References 7 publications

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“…The processing of FC data including radiometric calibration, photometric, and geometric correction is described in Roatsch et al . [] and Schröder et al . [].…”

Section: Data and Processingmentioning

confidence: 99%

An investigation of the bluish material on Ceres

Stephan

Jaumann

Krohn

et al. 2017

Geophysical Research Letters

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The dwarf planet Ceres shows spatially well‐defined regions, which exhibit a negative (blue) spectral slope between 0.5 and 2.5 µm. Comparisons with planetary bodies known to exhibit a blue slope and spectral properties of materials identified on Ceres's surface based on infrared wavelength signatures indicate that the spectral changes could be related to physical properties of the surface material rather than variations in its composition. The close association of bluish surface regions to fresh impact craters implies a possible relationship to an impact‐triggered alteration and/or space weathering processes. The bluish regions could be linked with blankets of ultrafine grains and partly amorphous phyllosilicates, which form larger agglomerates due to the sticky behavior of impact‐induced phyllosilicate dust and/or the amorphization of the ejecta material during the impact process. Space weathering processes (micrometeoritic impacts, temperature changes) cause a reversal of the agglutination process and a recrystallization of the surface material with time resulting in a reddening of the spectral slope.

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“…The processing of FC data including radiometric calibration, photometric, and geometric correction is described in Roatsch et al . [] and Schröder et al . [].…”

Section: Data and Processingmentioning

confidence: 99%

An investigation of the bluish material on Ceres

Stephan

Jaumann

Krohn

et al. 2017

Geophysical Research Letters

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“…We omit linear features that are solely within the floor of a single impact crater (see Buczkowski et al, ). Our global map contains 2,319 individual segments and is based on Dawn's Framing Camera and shape model data (Preusker et al, ; Roatsch et al, ) (Texts S1 and S2 in the supporting information) (Figures , S1, and S2). Using this global map, we identify two types of linear features: secondary crater chains and pit chains.…”

Section: Types Of Linear Features and Ejecta Distributionmentioning

confidence: 99%

Evidence for the Interior Evolution of Ceres from Geologic Analysis of Fractures

Scully

Buczkowski

Schmedemann

et al. 2017

Geophysical Research Letters

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Ceres is the largest asteroid belt object, and the Dawn spacecraft observed Ceres since 2015. Dawn observed two morphologically distinct linear features on Ceres's surface: secondary crater chains and pit chains. Pit chains provide unique insights into Ceres's interior evolution. We interpret pit chains called the Samhain Catenae as the surface expression of subsurface fractures. Using the pit chains' spacings, we estimate that the localized thickness of Ceres's fractured, outer layer is approximately ≥58 km, at least ~14 km greater than the global average. We hypothesize that extensional stresses, induced by a region of upwelling material arising from convection/diapirism, formed the Samhain Catenae. We derive characteristics for this upwelling material, which can be used as constraints in future interior modeling studies. For example, its predicted location coincides with Hanami Planum, a high‐elevation region with a negative residual gravity anomaly, which may be surficial evidence for this proposed region of upwelling material.

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“…FC is equipped with 7 narrow-band filters centered at different wavelengths in the overall spectral range ∼0.4-1.0 μm for compositional analysis, and a broad band clear filter devoted to geologic analysis (Sierks et al, 2011). In all maps, longitudes are East oriented, and are given in the Ceres coordinate system (Roatsch et al, 2016).…”

Section: Dataset and Methodsmentioning

confidence: 99%

“…Each quadrangle was named following the nomenclature indicated in Roatsch et al, 2016. In this paper, we describe the mineralogy of the Ac-H-8 Nawish quadrangle, covering a portion of the equatorial region of Ceres (lon 144°E-216°E, lat 22°S-22°N).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The mineralogy of Ceres’ Nawish quadrangle

Carrozzo

Zambon

Sanctis

et al. 2019

Icarus

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Quadrangle Ac-H-08 Nawish is located in the equatorial region of Ceres (Lat 22°S-22°N, Lon 144°E-216°E), and it has variable mineralogy and geology. Here, we report on the mineralogy using spectra from the Visible and InfraRed (VIR) mapping spectrometer onboard the NASA Dawn mission. This quadrangle has two generally different regions: the cratered highlands of the central and eastern sector, and the eastern lowlands. We find this dichotomy is also associated with differences in the NH 4 -phyllosilicates distribution. The highlands, in the eastern part of the quadrangle, appear depleted in NH 4 -phyllosilicates, conversely to the lowlands, in the north-western side. The Mg-phyllosilicates distribution is quite homogeneous across Nawish quadrangle, except for few areas. The 2.7-µm band depth is lower in the south-eastern part, e.g. in the Azacca ejecta and Consus crater ejecta, and the band depth is greatest for the Nawish crater ejecta, and indicates the highest content of Mg-phyllosilicates of the entire quadrangle. Our analysis finds an interesting relationship between geology, mineralogy, ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T 3 topography, and the age in this quadrangle. The cratered terrains in the highlands, poor in NH 4 phyllosilicates r r Ga). Conversely, the smooth terrain, such as with Vindimia Planitia, is richer in ammonia-bearing phy s t s s y u r Ga). At the local scale, Ac-H-8 Nawish, displays several interesting mineralogical features, such as at Nawish crater, Consus crater, Dantu and Azzacca ejecta, which exhibit localized Na-carbonates deposits. This material is superimposed on the cratered terrains and smooth terrains and shows the typical depletion of phyllosilicates, already observed on Ceres in the presence of Na-carbonates.

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High-resolution Ceres High Altitude Mapping Orbit atlas derived from Dawn Framing Camera images

Cited by 58 publications

References 7 publications

An investigation of the bluish material on Ceres

An investigation of the bluish material on Ceres

Evidence for the Interior Evolution of Ceres from Geologic Analysis of Fractures

The mineralogy of Ceres’ Nawish quadrangle

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