We present a general and significant relation between the spectral slope of silicate-rich asteroids (both main-belt and near-Earth asteroids) and the exposure to space weathering, computed taking into account the age and the distance from the Sun. We find strong evidence for the existence of a slope-distance relation that may identify the dominant space-weathering processes as Sun-related. In turn, the age estimates depend on various parameters and in particular on the effectiveness of the Yarkovsky-driven orbital mobility. We show that values of the parameters of the Yarkovsky effect consistent with recent experimental measurements can lead to a unique slope-age relation for main-belt and near-Earth asteroids.
Autori interni: | ||
Autori: | Marchi S; Paolicchi P; Lazzarin M; Magrin S | |
Titolo: | A general spectral slope-exposure relation for S-type main belt and near-earth asteroids | |
Anno del prodotto: | 2006 | |
Digital Object Identifier (DOI): | 10.1086/498721 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |