Olha que interessante... DETECTION OF RADIO EMISSION FROM - TopicsExpress

Olha que interessante... DETECTION OF RADIO EMISSION FROM FIREBALLS K. S. Obenberger, G. B. Taylor, J. M. Hartman, J. Dowell, S. W. Ellingson, J. F. Helmboldt, P. A. Henning, M. Kavic, F. K. Schinzel, J. H. Simonetti, K. Stovall, and T. L. Wilson We present the findings from the Prototype All-Sky Imager, a back end correlator of the first station of the Long Wavelength Array, which has recorded over 11,000 hr of all-sky images at frequencies between 25 and 75 MHz. In a search of this data for radio transients, we have found 49 long-duration (10 s of seconds) transients. Ten of these transients correlate both spatially and temporally with large meteors (fireballs), and their signatures suggest that fireballs emit a previously undiscovered low frequency, non-thermal pulse. This emission provides a new probe into the physics of meteors and identifies a new form of naturally occurring radio transient foreground. The Astrophysical Journal Letters, Volume 788 , Issue 2 (2014 June 20) iopscience.iop.org/2041-8205/788/2/L26/ newscientist/article/dn25667-fireball-meteors-emit-unique-radio-wave-signals.html?cmpid=RSS|NSNS|2012-GLOBAL|online-news

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