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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Analysis of the orbital evolution of exoplanets

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Carvalho, J. P. S. ; Vilhena de Moraes, R. ; Prado, A. F. B. A. ; Mourao, D. C. ; Winter, O. C.
Total Authors: 5
Document type: Journal article
Source: COMPUTATIONAL & APPLIED MATHEMATICS; v. 35, n. 3, p. 847-863, OCT 2016.
Web of Science Citations: 1

An exoplanet, or extrasolar planet, is a planet that does not orbit the Sun, but is around a different star, stellar remnant, or brown dwarf. Up to now, about 1900 exoplanets were discovered. To better understand the dynamics of these exoplanets, a study with respect to possible collisions of the planet with the central star is shown here. We present an expanded model in a small parameter that takes into account up to the fifth order to analyze the effect of this potential in the orbital elements of the extrasolar planet. Numerical simulations were also performed using the N-body simulations, using the software Mercury, to compare the results with the ones obtained by the analytical model. The numerical simulations are presented in two stages: one considering the celestial bodies as point masses and the other one taking into account their dimensions. This analysis showed that the planet collided with the central star in the moment of the first inversion for orbits with high inclinations in various situations. The results of the simulations of the equations developed in this study are consistent with the N-body numerical simulations. We analyze also the flip of the inclination taking into account the coupling of the perturbations of the third body, effect due to the precession of periastron and the tide effect. In general, we find that such perturbations combined delay the time of first inversion, but do not keep the planet in a prograde or retrograde orbit. (AU)

FAPESP's process: 11/08171-3 - Orbital dynamics of minor bodies
Grantee:Othon Cabo Winter
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/21023-6 - Artificial satellite dynamics
Grantee:Rodolpho Vilhena de Moraes
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/06688-7 - Dynamics of artificial satellites
Grantee:Antônio Fernando Bertachini de Almeida Prado
Support type: Regular Research Grants
FAPESP's process: 11/05671-5 - Stability analysis for planetary satellites orbits
Grantee:Jean Paulo dos Santos Carvalho
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/13101-4 - Study of orbital maneuvers to escape from collisions for a spacecraft and a group of particles
Grantee:Vivian Martins Gomes
Support type: Research Grants - Young Investigators Grants