Light Flashes Caused by Impacts against the Moon

Details Light Flashes Caused by Impacts against the Moon Light Flashes Caused by Impacts against the Moon

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..shk..l133n&link_type=abstract

American Physical Society, Shock Compression Meeting, July 27 - August 1, 1997, abstract #L1.33

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Scientific paper

Impacts of meteoroids on the airless cosmic bodies (asteroids, comets, Moon) result not only in cratering and fragmentation of a target, but cause a formation of radiating vapor plumes. Though the duration of the flash is rather short and the coefficient of the kinetic energy conversion into the radiation impulse is rather small (in comparison to the impacts onto the planets having atmospheres), nevertheless, it may be sufficient for detection of such impacts. An estimate of the light impulse created by a 1m-radius silica body impacting the lunar surface with the velocity of 50 km/s has been made by Melosh et al. (1993, XXIV LPS Conference, Abstracts pp. 975-976). In view of some impending experimental work (P.Franken, D. Crowe, I. Sobelman; private communications) it appeared important to review and refine the estimates of luminous efficiencies and other characteristics of impact originated light flashes, e.g. shape, duration, spectra for various velocities, sizes, composition etc. Our results will be presented and discussed. Department

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