Earth, Moon, and Planets 95,
245--253 (2005)
Elemental abundances in Leonid and Perseid meteoroids
Jiri Borovicka
Astronomical Institute, Academy of
Sciences, 251 65 Ondřejov, Czech Republic
Abstract. High dispersion photographic spectra of three
Leonid and five Perseid meteors are used to derive relative abundances
of nine chemical elements in the radiating meteoric vapors and in the
meteoroids. Al and Ca were found to be incompletely evaporated in the
main spectral component at 5000 K but completely evaporated in the
second component at 10,000 K. Si lines are present in both
components
which enhances the reliability of determination of the Si abundance.
The composition of the meteoroids was found to be more similar to comet
Halley than to chondritic meteoroids. Fe, Cr, and Mn are depleted and
Si, Na, and H are enhanced relative to Mg in comparison with CI
chondrites.
Keywords: Meteors - meteoroids - spectroscopy - composition - comets
______________________________
back to the list of publications
next abstract
previous abstract