The Librating Companions in HD 37124, HD 12661, HD 82943, 47 Ursa Majoris, and GJ 876: Alignment or Antialignment?

Open Access

6 June 2003

journal article
research article
Published by American Astronomical Society in The Astrophysical Journal

Vol. 591 (1) , L57-L60
https://doi.org/10.1086/377038

Abstract

We investigated the apsidal motion for the multiplanet 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. However, the companions of GJ 876 and υ And are in apsidal lock only about 0°. Moreover, we obtained the criteria with Laplace-Lagrange secular theory to discern whether a pair of planets for a certain system are in libration or circulation.

Keywords

All Related Versions

This publication has 25 references indexed in Scilit:

A Planetary Companion to HD 40979 and Additional Planets Orbiting HD 12661 and HD 38529
The Astrophysical Journal, 2003
The Janus Head of the HD 12661 Planetary System
The Astrophysical Journal, 2003
Could the 55 Cancri Planetary System Really Be in the 3[rcolon]1 Mean Motion Resonance?
The Astrophysical Journal, 2003
Stability of the HD 12661 Planetary System
Astronomy & Astrophysics, 2003
Seven New Keck Planets Orbiting G and K Dwarfs
The Astrophysical Journal, 2003
Stability of the 47 UMa planetary system
Astronomy & Astrophysics, 2002
Eccentricity Excitation and Apsidal Resonance Capture in the Planetary System υ Andromedae
The Astrophysical Journal, 2002
Dynamical Analysis of the Orbital Parameters of the HD 82943 Planetary System
The Astrophysical Journal, 2001
Apsidal Alignment in υ Andromedae
The Astronomical Journal, 2001
Evidence for Multiple Companions to υ Andromedae
The Astrophysical Journal, 1999