| Issue |
A&A
Volume 462, Number 3, February II 2007
|
|
|---|---|---|
| Page(s) | 1165 - 1170 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361:20066284 | |
| Published online | 27 November 2006 | |
Trojan planets in HD 108874?
1
Eötvös Loránd University, Departement of Astronomy, Pázmány Péter sétány 1/A, Budapest 1518, Hungary
2
Institute for Astronomy, University of Vienna, Türkenschanzstr. 17, 1180 Wien, Austria e-mail: dvorak@astro.univie.ac.at
Received:
22
August
2006
Accepted:
16
October
2006
Aims.It turned out recently that, in addition to a large planet with a semimajor axis 
AU
and a low eccentricity (
), the extrasolar planetary system HD 108874
harbors another massive planet with 
AU. The inner planet is
orbiting the G5 host star in the habitable zone (=HZ); so that we could established
stable regions for Earth-like Trojan planets.
Methods.We integrated some 105 orbits of fictitious Trojans around the Lagrangian points for up to 107 years and checked the stability of the orbital elements and their chaoticity with the aid of the Fast Lyapunov Indicator.
Results.It turns out that this multiplanetary system is the first one where – with the uncertainties in eccentricity and semimajor axes of the outer planet – the existence of Trojan terrestrial planets in stable orbits in the HZ is possible for some combinations of the orbital parameters.
Key words: celestial mechanics / chaos / stars: planetary systems
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.