Physics
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997p%26ss...45..337m&link_type=abstract
Planetary and Space Science, v. 45, p. 337-344.
Physics
16
Scientific paper
The combined effects are studied of gas drag and gravitational perturbations by a proto-Jupiter on the orbital evolution of a swarm of planetesimals in the primordial asteroid belt in the 2:1 mean motion resonance region. The gas drag in the primordial nebula causes planetesimals to spiral towards the Sun and, therefore, to cross mean motion resonances with proto-Jupiter. The dynamics of planetesimals are numerically investigated while passing through an inner resonance in a planar model. It is found that eccentricities are drastically increased and the maximum value reached by each planetesimal depends only on the resonance argument ψ at the resonance entry. The higher average eccentricity of the swarm within the resonance borders induces a faster spiralling rate of planetesimals and a consequent decrease of their number density, in particular at the 2:1, the most relevant resonance in the asteroid belt. This phenomenon causes the formation of a gap in the swarm at the resonance location. By integrating a large number of planetesimal orbits, the gap formation process is analysed; it is found that the planetesimal number density near the resonance centre is reduced to 10-40% of its average value, depending on the free eccentricity assumed for the proto-Jupiter. Relative velocities between planetesimals are increased by a factor of four by resonant perturbations, favouring fragmentation at impacts; higher impact velocities and the reduced planetesimal density slow down the planetesimal accretion process and inhibit the formation of big bodies in the resonance region.
Marzari Francesco
Scholl Hans
Tomasella Lina
Vanzani V.
No associations
LandOfFree
Gas drag effects on planetesimals in the 2:1 resonance with proto-Jupiter 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 Gas drag effects on planetesimals in the 2:1 resonance with proto-Jupiter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas drag effects on planetesimals in the 2:1 resonance with proto-Jupiter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-875824