SpringerLink
Forum Springer Astron. Astrophys.
Forum Whats New Search Orders


Astron. Astrophys. 329, 785-791 (1998)

Next Section Table of Contents

Dust production by impacts of interstellar dust on Edgeworth-Kuiper Belt objects

S. Yamamoto and T. Mukai

The Graduate School of Sci. and Tech., Kobe University, Nada, Kobe 657, Japan (yamachan@komadori.earth.s.kobe-u.ac.jp)

Received 6 May 1997 / Accepted 21 July 1997

Abstract

We estimated the production rate of dust grains by the impacts of interstellar dust grains on Edgeworth-Kuiper Belt objects (EKOs). In this scenario, the impact ejecta become interplanetary dust particles with radii smaller than about 10 [FORMULA]. If the EKOs have hard icy surfaces and there are [FORMULA] of these with radii [FORMULA] 0.1 km, the total dust production rate over the entire Edgeworth-Kuiper Belt ranges from [FORMULA] g s-1 to [FORMULA] g s-1, depending on the adopted minimum ejection velocity (10 cm s [FORMULA] 103 cm s-1). If the surfaces of EKOs are covered by a layer of icy particles with radii smaller than those of the incident dust grains, then the total dust production rate is enhanced slightly to about [FORMULA] g s-1. Adopting the different collisional parameters used by Stern (1996), we find that the production rate of dust grains with radii smaller than 10 [FORMULA] by mutual collisions of EKOs is between [FORMULA] g s-1 and [FORMULA] g s-1. Therefore dust production due to the impacts by interstellar dust on EKOs is a significant source of interplanetary dust grains, at least for those far from the sun with radii smaller than about 10 [FORMULA].

Key words: minor plantes – interplanetary medium

Contents

Next Section Table of Contents

© European Southern Observatory (ESO) 1998

Online publication: December 8, 1997
helpdesk.link@springer.de