Planetary migration in a planetesimal disk why did Neptune
stop at AU
Ro dney S Gomes
GEA OV UFRJ and ON MCT
Ladeira do Pedro Ant onio Centro Rio de Janeiro RJ Brazil
Tel
Fax
E mail ro dney ov ufrj br
Alessandro Morbidelli
Observatoire de la C ote d Azur Nice France
Harold F Levison
Southwest Research Institute Boulder Colorado USA