Mathematics – Logic
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p51c1421e&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #P51C-1421
Mathematics
Logic
5420 Impact Phenomena, Cratering (6022, 8136), 6017 Erosion And Weathering, 6022 Impact Phenomena (5420, 8136), 6055 Surfaces, 6205 Asteroids
Scientific paper
The surface of Eros is known to have regions of reduced small crater (0.2 - 1.0 km diameter) density that correlate well with radial distance from Shoemaker crater but not with its presumed ejecta pattern. It has been suggested that these deficits result from seismic shaking produced by the Shoemaker impact. Here we further address the role of seismic shaking on Eros by assessing its morphological effects on the largest (> 0.6 km) craters. Due to their large size, many of these craters likely predate the formation of Shoemaker. Although they are too big to be erased by seismic shaking, their dimensions (primarily their depths) should have been modified. We measure the crater depth (d) and diameter (D) using co-registered high-resolution images (MSI) and lidar data (NLR) as well as a stereophotoclinometry (SPC) shape model. The measured d/D decreases as a function of decreasing distance from Shoemaker, a trend consistent with expectations for modification by seismic shaking. Additional morphological trends as functions of proxim-ity, ejecta distribution, local slope effects, crater age, and underlying structural influences will be discussed.
Barnouin-Jha Olivier Serge
Ernst Carolyn M.
Gaskell Robert W.
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