A search for large meteoroids in the Perseid stream

Details A search for large meteoroids in the Perseid stream A search for large meteoroids in the Perseid stream

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999m%26ps...34..849b&link_type=abstract

Meteoritics & Planetary Science, vol. 34, no. 6, pp. 849-852 (1999).

Computer Science

Sound

9

Scientific paper

We report on two surveys conducted during the times of Perseid shower maximum in 1997 and 1998. The first survey entailed the video monitoring of the Moon's disk with the intent of recording the optical flashes that should result when large meteoroids strike the lunar surface. The second survey consisted of a combination video camera and very low frequency (VLF) radio wave receiver system capable of detecting electrophonic meteors during their ablation in the Earth's atmosphere. Using standard ablation theory we find that for a Perseid meteoroid to be capable of generating electrophonic sounds it must have an initial mass in excess of 495 kg. We also find, as a result of the surveys, an upper limit of 2x10-17 per m2 per second to the flux of electrophonic Perseid meteors entering the Earth's atmosphere. While our study indicates that large, meter-sized meteoroids must, at best, be sparsely distributed within the Perseid stream, we briefly discuss some tantalizing lines of evidence, found from within the astronomical literature, that hint at their true existence.

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