Trojan Pairs in the Hd 128311 and Hd 82943 Planetary Systems?
نویسنده
چکیده
Two nearby stars, HD 128311 and HD 82943, are believed to host pairs of Jupiter-like planets involved in a strong first order 2:1 mean motion resonance. In this work we reanalyze available radial velocity (RV) measurements and demonstrate that it is also possible to explain the observed RV variations of the parents stars as being induced by a pair of Trojan planets. We show that these Trojan configurations reside in extended zones of stability in which such systems may easily survive in spite of large masses of the planets, large eccentricities and nonzero mutual inclinations of their orbits. Subject headings: celestial mechanics, stellar dynamics—methods: numerical, N-body simulations— planetary systems—stars: individual (HD 82943, HD 128311)
منابع مشابه
, 47 Uma and GJ 876 : Alignment or Antialignment ?
We investigated the apsidal motion for the multi-planet systems. In the simulations, we found that the two planets of HD 37124, HD 12661, 47 Uma and HD 82943 separately undergo apsidal alignment or antialignment. But the companions of GJ 876 and υ And are only in apsidal lock about 0. Moreover, we obtained the criteria with Laplace-Lagrange secular theory to discern whether a pair of planets fo...
متن کاملSystemic: A Testbed for Characterizing the Detection of Extrasolar Planets. I. The Systemic Console Package
We present the Systemic Console, a new all-in-one, general-purpose software package for the analysis and combined multiparameter fitting of Doppler radial velocity (RV) and transit timing observations. We give an overview of the computational algorithms implemented in the console, and describe the tools offered for streamlining the characterization of planetary systems. We illustrate the capabi...
متن کاملFive New Multicomponent Planetary Systems
We report Doppler measurements for six nearby Gand K-type main-sequence stars that showmultiple low-mass companions, at least one of which has planetary mass. One system has three planets, the fourth triple-planet system known around a normal star, and another has an extremely low minimum mass of 18 M . HD 128311 (K0 V) has two planets (one previously known) with minimum masses (M sin i) of 2.1...
متن کاملar X iv : a st ro - p h / 03 01 35 3 v 1 1 7 Ja n 20 03 The Apsidal Alignment of the HD 82943 System
We perform numerical simulations to explore the dynamical evolution of the HD 82943 planetary system. By simulating diverse planetary configurations, we find two mechanisms to maintain the stability of the system: the 2:1 mean motion resonance between the planets can act as the first mechanism for all stable orbits. The second mechanism is the apsidal alignment and we find that the difference o...
متن کاملar X iv : a st ro - p h / 03 01 35 3 v 4 2 7 Fe b 20 03 The Apsidal Antialignment of the HD 82943 System †
We perform numerical simulations to explore the dynamical evolution of the HD 82943 planetary system. By simulating diverse planetary configurations, we find two mechanisms of stabilizing the system: the 2:1 mean motion resonance between the two planets can act as the first mechanism for all stable orbits. The second mechanism is a dynamical antialignment of the apsidal lines of the orbiting pl...
متن کامل