Other
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005kfnts...5..504c&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, Suppl, v. 5, p. 504-508
Other
Scientific paper
Some spectra of Comet C/1999 S4 (LINEAR) are obtained with the UAGS spectrograph (long slit and CCD) installed on the 1-m Zeiss reflector of the SAO RAS (the Northern Caucasus, Nizhny Arkhyz) on July 23/24, 26/27, and 27/28, 2000. Sophisticated identification of emission lines in the spectra of Comet C/1999 S4 (LINEAR) is made. Emission lines of the molecules C2, C3, CN, NH, CH, NH2, CO+, H2O+, and others were identified in the spectra of Comet C/1999 S4 (LINEAR) derived on July 22/23, 2000 before splitting the cometary nucleus. Analysis of the CCD spectra obtained on July 27/28, 2000 reveals very weak emission lines superposed on the solar reflection spectrum, unlike the case of spectra obtained with the same instrument on July 22/23. From analysis of the surface brightness profile of C2 along the slit, the velocity of expansion of two secondary fragments (V=10 km/hr) and energy of fragment expansion (E = 8.7 \cdot 1015 erg) are estimated. The luminescence cometary continuum is detected by a level of 26% at 5000 Å in the spectra of the comet. Possible mechanisms of nucleus splitting are discussed.
Chubko Larisa S.
Churyumov Klim I.
Kleshchonok Valeriy V.
Lukýanyk Igor V.
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