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Constraining the cratering chronology of Vesta.

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Title: Constraining the cratering chronology of Vesta.
Authors: O׳Brien, David P.1 obrien@psi.edu, Marchi, Simone2, Morbidelli, Alessandro3, Bottke, William F.2, Schenk, Paul M.4, Russell, Christopher T.5, Raymond, Carol A.6
Source: Planetary & Space Science. Nov2014, Vol. 103, p131-142. 12p.
Subjects: Cratering, Meteorites, Evolutionary theories, Chronology, Asteroid belt, Vesta (Asteroid)
Abstract: Vesta has a complex cratering history, with ancient terrains as well as recent large impacts that have led to regional resurfacing. Crater counts can help constrain the relative ages of different units on Vesta׳s surface, but converting those crater counts to absolute ages requires a chronology function. We present a cratering chronology based on the best current models for the dynamical evolution of asteroid belt, and calibrate it to Vesta using the record of large craters on its surface. While uncertainties remain, our chronology function is broadly consistent with an ancient surface of Vesta as well as other constraints such as the bombardment history of the rest of the inner Solar System and the Ar–Ar age distribution of howardite, eucrite and diogenite (HED) meteorites from Vesta. [ABSTRACT FROM AUTHOR]
Copyright of Planetary & Space Science is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 99105998
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Vesta has a complex cratering history, with ancient terrains as well as recent large impacts that have led to regional resurfacing. Crater counts can help constrain the relative ages of different units on Vesta׳s surface, but converting those crater counts to absolute ages requires a chronology function. We present a cratering chronology based on the best current models for the dynamical evolution of asteroid belt, and calibrate it to Vesta using the record of large craters on its surface. While uncertainties remain, our chronology function is broadly consistent with an ancient surface of Vesta as well as other constraints such as the bombardment history of the rest of the inner Solar System and the Ar–Ar age distribution of howardite, eucrite and diogenite (HED) meteorites from Vesta. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Planetary & Space Science is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.pss.2014.05.013
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      – SubjectFull: Evolutionary theories
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              Text: Nov2014
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