Stability of discs and planetary formation around binary systems
Observational study and dynamic of binary systems in the exoplanet context.
Topics of orbital dynamics and machine learning tools applied to planetary systems...
| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 444, n. 3, p. 2167-2177, NOV 1 2014. |
| Web of Science Citations: | 12 |
| Abstract | |
In this paper, we investigate whether hypothetical Earth-like planets have high probability of remaining on stable orbits inside the habitable zones around the stars A and B of alpha Centauri, for lengths of time compatible with the evolution of life. We introduce a stability criterion based on the solution of the restricted three-body problem and apply it to the alpha Centauri system. In this way, we determine the regions of the short-term stability of the satellite-type planetary orbits, in both planar and three-dimensional cases. We also study the long-term stability of hypothetical planets through the dynamical mapping of the habitable zones of the stars. The topology of the maps is analysed using the semi-analytical secular Hamiltonian model and possible processes responsible for long-lasting instabilities are identified. We verify that the planetary motion inside the habitable zones is regular, regardless of high eccentricities, for inclinations smaller than 40 degrees. We show that the variation of the orbital distance of the planet located in the habitable zones of the binary is comparable to that of Earth, if the planet is close to the Mode I stationary solution. This result brings positive expectations for finding habitable planets in binary stars. (AU) | |
| FAPESP's process: | 10/01209-2 - Modeling the Planetary Motion on Multiple Star Systems |
| Grantee: | Eduardo Andrade Inês |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center |
| Grantee: | Elisabete Maria de Gouveia Dal Pino |
| Support Opportunities: | Multi-user Equipment Program |