"Global Surface Modification of Asteroid 4 Vesta Following the Rheasilv" by Timothy Joseph Bowling

Date of Award

January 2015

Degree Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Earth, Atmospheric, and Planetary Sciences

First Advisor

Henry J Melosh

Second Advisor

Andrew Freed

Committee Member 1

David Minton

Committee Member 2

Marc Caffee

Committee Member 3

James Richardson

Abstract

4 Vesta, the second most massive asteroid in the Solar System, was the recent target of NASA’s Dawn mission, which spent many months orbiting and analyzing the body. A geologically young (~1 Ga) giant impact basin, Rheasilvia, which has a diameter nearly equal to that of Vesta, dominates Vesta’s southern hemisphere. In addition to opening a massive crater, the impact that formed the Rheasilvia basin produced a shockwave that was sufficiently strong to modify Vesta’s surface morphology on a nearly global scale.

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