Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..345s&link_type=abstract
In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw
Astronomy and Astrophysics
Astrophysics
Meteoroids, Atmosphere, Dynamics
Scientific paper
To gain insight into the dispersion of the swarm of fragments due to differential atmospheric pressure across it, I derive an approximate analytical solution to the simple analytic model of lateral spreading of the cyclinder-like swarm of fragments in which gravitational acceleration and ablation are neglected. The solution is applicable to the initial fragmentation stage of large meteoroids with R* < R0 <= 0.05 R*, where R* is the critical radius for aerodynamic dispersion. For such meteoroids, fragmentation by aerodynamic forces is too small to cause catastrophic fragmentation or atmospheric explosion. The swarm of fragments never expands up to 1.3 times the initial radius of meteoroid at the end of the initial fragmentation stage. After that, further fragmentation and even atmospheric explosion is possible to occur, but the simple analytic model and its solution are no longer applicable.
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