Airburst origin of dark shadows on Venus

Details Airburst origin of dark shadows on Venus Airburst origin of dark shadows on Venus

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9710243z&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E6, June 25, 1992, p. 10,243-10,255. Research supported by NASA.

Statistics

33

Bursts, Planetary Craters, Shock Wave Interaction, Venus Atmosphere, Venus Surface, Hypervelocity Impact, Meteorite Craters, Monte Carlo Method

Scientific paper

The Magellan images showed presence of radar-dark shadowlike disks surrounding small impact craters on the Venusian surface, which are also found without craters. This paper examines the hypothesis of Phillips et al. (1991) that the dark shadows formed where shock waves from airbursting impactors met the ground, pulverizing decimeter-scale surface features. A simple analytic model is used successfully to simulate the catastrophic disruption and the deceleration of impactors in a thick atmosphere to reproduce observed Venusian cratering statistics and generate radar-dark disks by the impact of atmospheric shock waves on the surface.

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