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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28719
Title: The missing large impact craters on Ceres
Authors: Marchi, S.
Ermakov, A. I.
Raymond, C. A.
Fu, R. R.
O'Brien, D. P.
Bland, M. T.
Ammannito, E.
DE SANCTIS, MARIA CRISTINA 
Bowling, T.
Schenk, P.
Scully, J. E. C.
Buczkowski, D. L.
Williams, D. A.
Hiesinger, H.
Russell, C. T.
Issue Date: 2016
Journal: NATURE COMMUNICATIONS 
Number: 7
Issue: 1
First Page: 12257
Abstract: Asteroids provide fundamental clues to the formation and evolution of planetesimals. Collisional models based on the depletion of the primordial main belt of asteroids predict 10-15 craters >400 km should have formed on Ceres, the largest object between Mars and Jupiter, over the last 4.55 Gyr. Likewise, an extrapolation from the asteroid Vesta would require at least 6-7 such basins. However, Ceres' surface appears devoid of impact craters >~280 km. Here, we show a significant depletion of cerean craters down to 100-150 km in diameter. The overall scarcity of recognizable large craters is incompatible with collisional models, even in the case of a late implantation of Ceres in the main belt, a possibility raised by the presence of ammoniated phyllosilicates. Our results indicate that a significant population of large craters has been obliterated, implying that long-wavelength topography viscously relaxed or that Ceres experienced protracted widespread resurfacing.
URI: http://hdl.handle.net/20.500.12386/28719
URL: https://www.nature.com/articles/ncomms12257
ISSN: 2041-1723
DOI: 10.1038/ncomms12257
Bibcode ADS: 2016NatCo...712257M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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