Dust production by impacts of interstellar dust on Edgeworth-Kuiper Belt objects
S. Yamamoto and
Received 6 May 1997 / Accepted 21 July 1997
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 . If the EKOs have hard icy surfaces and there are of these with radii 0.1 km, the total dust production rate over the entire Edgeworth-Kuiper Belt ranges from g s-1 to g s-1, depending on the adopted minimum ejection velocity (10 cm s 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 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 by mutual collisions of EKOs is between g s-1 and 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 .
Key words: minor plantes interplanetary medium
© European Southern Observatory (ESO) 1998
Online publication: December 8, 1997