Some physical parameters in spectra of comets 103P/Hartley 2, C/2009 K5 (McNaught), C/2009 P1 (Garradd) and C/2007 N3 (Lulin)
Abstract
Results of observations and study of middle-resolution optical spectra (λ/Δλ=1500 and λ/Δλ=15000) of comets 103P/Hartley 2, C/2009 K5 (McNaught), C/2009 P1 (Garradd) and C/2007 N3 (Lulin) were presented. The spectra were obtained with the echelle spectrograph and with the slit spectrograph installed on the 2-m Zeiss reflector of the High-mountain astronomical station of Institute of Astronomy of Russian Academy of Sciences and Main Astronomical Observatory of National Academy of Sciences of Ukraine at Terskol in 2009-2011 years. The energy distributions in the spectra for the near nucleus regions of comets were built and detailed identification of the spectral emission lines in the spectra was made. Physical parameters of the neutral comas of comets (velocities of gas expansion, lives times of molecules C2, C3 and CN and other parameters) were calculated using the Shulman’s and Haser's models. Comparative analysis of the spectra of comets was made.
- Publication:
-
40th COSPAR Scientific Assembly
- Pub Date:
- 2014
- Bibcode:
- 2014cosp...40E.560C