Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2012-03-14
Celest.Mech.Dyn.Astron. 113, 2012
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
12 pages, 9 figures
Scientific paper
10.1007/s10569-012-9407-1
We have done a new analysis of the available observations for the GJ581 exoplanetary system. Today this system is controversial due to choices that can be done in the orbital determination. The main ones are the ocurrence of aliases and the additional bodies - the planets f and g - announced in Vogt et al. 2010. Any dynamical study of exoplanets requires the good knowledge of the orbital elements and the investigations involving the planet g are particularly interesting, since this body would lie in the Habitable Zone (HZ) of the star GJ581. This region,for this system, is very attractive of the dynamical point of view due to several resonances of two and three bodies present there. In this work, we investigate the conditions under which the planet g may exist. We stress the fact that the planet g is intimately related with the orbital elements of the planet d; more precisely, we conclude that it is not possible to disconnect its existence from the determination of the eccentricity of the planet d. Concerning the planet f, we have found one solution with period $\approx 450$ days, but we are judicious about any affirmation concernig this body because its signal is in the threshold of detection and the high period is in a spectral region where the ocorruence of aliases is very common. Besides, we outline some dynamical features of the habitable zone with the dynamical map and point out the role played by some resonances laying there.
dos Santos Tadeu M.
Ferraz-Mello Sylvio
Michtchenko Tatiana A.
Silva Guillermo
No associations
LandOfFree
A new analysis of the GJ581 extrasolar planetary system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new analysis of the GJ581 extrasolar planetary system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new analysis of the GJ581 extrasolar planetary system will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-716069