Abstract
More than 100 extrasolar planets have been discovered since the 1990s. Unlike those of the solar system, these planets' orbital eccentricities cover a huge range from 0 to 0:7. Incidentally, the first Kuiper belt object was discovered in 1992. Thus an interesting and important question will be whether extrasolar planetary systems could have structures like the Kuiper belt or asteroid belt. We investigate the stability of these planetary systems with different orbital eccentricities by similar procedures to Rabl & Dvorak (1988) and Holman & Wiegert (1999). We claim that most extrasolar planetary systems can have their own belts at the outer regions. However, we find that orbits with high eccentricity are very powerful in depletion of these populations. © Copyright 2004: IA, UNAM.