FLUORESCENT CONTINUUM AND CHARACTERISTIC SCALES OF PARENT AND DAUGHTER MOLECULES IN THE COMA OF COMET C/2009 K5 (MCNAUGHT) FOR SPECTRAL OBSERVATIONS IN MARCH–APRIL 2010

К. І. Чурюмов, В. О. Пономаренко, В. В. Клещонок, О. Р. Баранський, І. В. Лук’яник

Abstract


Six middle-resolution opticalspectra of comet C/2009 K5 (McNaught) were obtained from 27 March to 2 April 2010 with the help of the 2-mZeiss reflector and echelle-spectrograph of the High-mountain astronomical station “Terskol” of Institute of Astronomyof Russian Academy of Sciences and Main Astronomical Observatory of National Academy of Sciences of Ukraine.The comet was at heliocentric distance 1.5 A.U. and geocentric one 1.4 A.U. and had the integral magnitude equalto T ≈11m. We present the energy distribution in the spectra of comet С/2009 К5 and the energy distribution ofcomet emissions along the slit of the spectrograph. Some physical parameters of the neutral coma of comet werecalculated with the help of Haser’s models. The detailed identification of the spectral emission lines in these spectrawere obtained. Presence of luminescent continuum in the spectra of comet С/2009 К5 is discussed and some physicalparameters of luminescent continuum were calculated.

Keywords


comet C/2009 K5 (McNaught); spectrum; emission lines; luminescent continuum.

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