Jupiter barrier
The term Jupiter Barrier or sometimes Jupiter-Saturn Barrier describes the property of the gas planets in the solar system (especially Jupiter ), due to their large mass , to prevent objects from the inner Oort cloud or from the asteroid belt from entering the area of the inner planets to reach.
The change in the perihelion distance of an object from the Oort cloud between two orbits through the outer solar system is a strong function of the major semi-axis (proportional to the major semi-axis to the power of 7/2). If the major semi-axis of an object from the Oort cloud is smaller than about 10,000 AU to 20,000 AU, the change in its perihelion distance to be expected between two orbits through the outer solar system is so small that the area of the gas planets can no longer be overcome in one step . The objects therefore stay longer in the area of these planets and are very likely to be "thrown" out of the solar system by the gravitational effect of the planets.
However, whether Jupiter actually fulfills a “protective function” in the overall effect has been questioned in more recent publications.
literature
- Mikhail Kovlevich Marov, Mikhail Y. Marov, Hans Rickman: Collisional Processes in the Solar System . Springer 2001, ISBN 0792369467 , pp. 80-82
- Julio A. Fernandez: Comets: Nature, Dynamics, Origin, and their Cosmogonical Relevance . Springer, 2006, ISBN 9781402034954 , pp. 136-138
Web links
- Harold F. Levison, Luke Dones, Martin J. Duncan: The Origin Of Halley-Type Comets: Probing The Inner Oort Cloud
- Luke Dones, Paul R. Weissmann, Harold F. Levison, Michael J. Duncan: Oort Cloud Formation and Dynamics (PDF file; 649 kB)