Analysis of the orbital evolution of exoplanets

Author(s)

Carvalho, J. P. S. ; Vilhena de Moraes, R. ; Prado, A. F. B. A. ; Mourao, D. C. ; Winter, O. C.

• Document type: Journal article
• Source: COMPUTATIONAL & APPLIED MATHEMATICS; v. 35, n. 3, p. 17-pg., 2016-10-01.

Abstract

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: 12/21023-6 - Artificial satellite dynamics
• Grantee: Rodolpho Vilhena de Moraes
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/06688-7 - Dynamics of artificial satellites
• Grantee: Antônio Fernando Bertachini de Almeida Prado
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/08171-3 - Orbital dynamics of minor bodies
• Grantee: Othon Cabo Winter
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 11/05671-5 - STABILITY ANALYSIS FOR PLANETARY SATELLITES ORBITS
• Grantee: Jean Paulo dos Santos Carvalho
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• 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 Opportunities: Research Grants - Young Investigators Grants