Outcome of Resonant Encounters

The main application of the second fundamental model of resonance is the study of resonant encounters that may occur in the course of the orbital evolution of two celestial bodies. As seen above, orbital evolution takes place in the case of migrating planets in the protoplanetary disk. The outcome of a resonant encounter can either be resonant capture or passing through a resonance without capture. The Hamiltonian (5.9) depends only on the parameter 5. The action J is defined for a given value...

Summary

An earth-system model has been applied to study the habitability of an earthlike planet in the solar system and in extrasolar planetary systems with a different mass and age of the central star. Habitability is defined by a nonvan-ishing biological productivity of a photosynthesis-driven biosphere. The most prominent features observed in this approach are the age-dependent narrowing and the final disappearance of the HZ. Furthermore, we studied the principle possibility of orbitally stable...

Info

In this review we have studied possible formation scenarios of the observed mean-motion resonances in extrasolar planetary systems. As the majority of resonant systems are locked in a 2 1 resonance we concentrate in particular on these systems. We have shown that planet-disk interaction between young embedded protoplanets and the protoplanetary disk may usually lead to a differential migration where the outer planet approaches the inner one. To analyze the outcome of the convergent migration we...

References

1 Struve, O. 1952, Proposal for a project of high-precision stellar radial velocity work, The Observatory, 72,199-200. 2 Rosenblatt, F. 1971, A two-color photometric method for detection of extra solar planetary systems, Icarus, 14, 71. 3 Borucki, W. J. and Summers, A. L. 1984, The photometric method of detecting other planetary systems, Icarus, 58,121134. 4 Deeg, H. J., Doyle, L. R., Kozhevnikov, V. P., Martin, E. L., Oetiker, B., Palaiolo-gou, E., Schneider, J., Afonso, C., Dunham, E. W.,...

Terrestrial Planet Finder Infrared TPFI

TPF-I will determine the planet's period, infrared brightness, amounts of life-related atmospheric gases (water vapor, ozone, carbon dioxide, methane, and nitrous oxide), and orbital distance, shape, and orientation. If the planet's atmosphere is transparent enough, TPF-I will determine the planet's length of day, ocean land ratio, and cloud variability. One TPF-I concept uses an array of four formation-flying, large, cooled telescopes (3 to 4 meters) flying in precise formation with...

The Global Carbon Cycle

The carbon cycle is the main process for the regulation of the atmospheric composition and climate with respect to increasing insolation. Walker et al. 17 , Berner 18 , Berner et al. 19 , Lasaga et al. 20 , von Bloh et al. 21 , and Franck et al. 22 as well as many others, investigated the so-called carbonate-silicate geochemical cycle between the atmosphere, the ocean, and the continents. The main feedback loop stabilizing the planetary climate is given by the silicate rock weathering. An...

Astrocentric Frame

Comparisons Between Coordinate Systems We have seen that, at least formally, the Poincare formalism is simpler and more compact than the Jacobi variables. But how does each perform in practice We have simulated the short-term orbital evolution of a co-planar system formed by a central star with m0 0.32M and two planets with masses m1 20MJup and m2 5MJup. Initial conditions were chosen such that both planets have circular orbits with semi-major axes a1 0.131 AU and a2 0.232 AU and are in...

Wleyvch

KGaA All books published by Wiley-VCH are carefully produced. Nevertheless, authors, editors, and publisher do not warrant the information contained in these books, including this book, to be free of errors. Readers are advised to keep in mind that statements, data, illustrations, procedural details or other items may inadvertently be inaccurate. Library of Congress Card No. applied for British Library Cataloguing-in-Publication Data A catalogue record for this...