Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...424..317b&link_type=abstract
Astronomy and Astrophysics, v.424, p.317-323 (2004)
Astronomy and Astrophysics
Astrophysics
1
Meteors, Meteoroids
Scientific paper
Prism spectra are studied of eight bright meteors, belonging to different showers and photographed by small cameras in the Gissar observatory of the Institute of Astrophysics, Tajik Academy of Sciences. Monochromatic light curves for the H and K spectral lines of the ionized calcium doublet are constructed and from the ratio of their intensities at selected points along the meteor trajectories the column NCaII and the volume nCaII concentrations of calcium ions are determined. The obtained values NCaII= 1016-1018 cm-2 and nCaII= 1013-1015 cm-3 are in good agreement with the estimates of calcium abundance obtained by other methods and confirm that there is almost full ionization of calcium atoms in meteor comae. The volume concentration of free electrons ne=4× 1013 cm-3 is defined, and the excitation temperature is calculated along the meteor paths.
Tables \ref{tab2}-\ref{tab9} are only available in electronic form at http://www.edpsciences.org
Babadzhanov Pulat B.
Kokhirova G. I.
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