Formation of sharp edges and planar areas of asteroids by polyhedral abrasion

Date
Authors
Domokos, G.
Sipos, A. Á.
Szabó, Gy. M.
Várkonyi, P. L.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
While the number of asteroids with known shapes has drastically increased over the past few years, little is known on the the time-evolution of shapes and the underlying physical processes. Here we propose an averaged abrasion model based on micro-collisons, accounting for asteroids not necessarily evolving toward regular spheroids, rather (depending on the fall-back rate of ejecta) following an alternative path, thus confirming photometry-derived features, e.g. existence of large, relatively flat areas separated by edges. We show that our model is realistic, since the bulk of the collisions falls into this category.
Comment: 17 pages, 3 figures, accepted by Astrophysical Journal
Keywords
Astrophysics - Earth and Planetary Astrophysics
Citation
Collections