Chondrule formation during planetesimal accretion

Details Chondrule formation during planetesimal accretion Chondrule formation during planetesimal accretion

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011e%26psl.308..369a&link_type=abstract

Earth and Planetary Science Letters, Volume 308, Issue 3, p. 369-379.

Computer Science

2

Chondrules, Chondrites, Planetesimals, Collisions, Origins

Scientific paper

We explore the idea that most chondrules formed as a consequence of inefficient pairwise accretion, when molten or partly molten planetesimals ~ 30-100 km diameter, similar in size, collided at velocities comparable to their two-body escape velocity ~ 100 m/s. Although too slow to produce shocks or disrupt targets, these collisions were messy, especially after ~ 1 Ma of dynamical excitation. In SPH simulations we find that the innermost portion of the projectile decelerates into the target, while the rest continues downrange in massive sheets. Unloading from pre-collision hydrostatic pressure P0 ~ 1-100 bar into the nebula, the melt achieves equilibrium with the surface energy of chondrule-sized droplets. Cooling is regulated post collision by the expansion of the optically thick sheets. on a timescale of hours-days. Much of the sheet rains back down onto the target to be reprocessed; the rest is dispersed.

Affiliated with

Also associated with

No associations

Rating

Chondrule formation during planetesimal accretion 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 Chondrule formation during planetesimal accretion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chondrule formation during planetesimal accretion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1673315