Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...611..517l&link_type=abstract
The Astrophysical Journal, Volume 611, Issue 1, pp. 517-527.
Astronomy and Astrophysics
Astronomy
39
Celestial Mechanics, Stars: Planetary Systems, Planets And Satellites: General
Scientific paper
A diversity of 2:1 resonance configurations can be expected in extrasolar planetary systems, and their geometry can provide information about the origin of the resonances. Assembly during planet formation by the differential migration of planets due to planet-disk interaction is one scenario for the origin of mean-motion resonances in extrasolar planetary systems. The stable 2:1 resonance configurations that can be reached by differential migration of planets with constant masses and initially coplanar and nearly circular orbits are (1) antisymmetric configurations with the mean-motion resonance variables θ1=λ1-2λ2+ϖ1 and θ2=λ1-2λ2+ϖ2 (where λj and ϖj are the mean longitudes and the longitudes of periapse, respectively) librating about 0° and 180°, respectively (as in the Io-Europa pair), (2) symmetric configurations with both θ1 and θ2 librating about 0° (as in the GJ 876 system), and (3) asymmetric configurations with θ1 and θ2 librating about angles far from either 0° or 180°. There are, however, stable 2:1 resonance configurations with symmetric (θ1~θ2~0deg), asymmetric, and antisymmetric (θ1~180deg and θ2~0deg) librations that cannot be reached by differential migration of planets with constant masses and initially coplanar and nearly circular orbits. If real systems with these configurations are ever found, their origin would require (1) a change in the planetary mass ratio m1/m2 during migration, (2) a migration scenario involving inclination resonances, or (3) multiple-planet scattering in crowded planetary systems. We find that the asymmetric configurations with large e2 and the θ1~180deg and θ2~0deg configurations have intersecting orbits and that the θ1~θ2~0deg configurations with e1>0.714 have prograde periapse precessions.
No associations
LandOfFree
Diversity and Origin of 2:1 Orbital Resonances in Extrasolar Planetary Systems 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 Diversity and Origin of 2:1 Orbital Resonances in Extrasolar Planetary Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diversity and Origin of 2:1 Orbital Resonances in Extrasolar Planetary Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1857799