The spectrum of comet C/2009 P1 (Garradd) in optical wavelength region
| 1Shubina, OS, 1Korsun, PP, 2Afanasiev, VL 1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine 2Special Astrophysical Observatory of the Russian Academy of Science, Nizhny Arkhyz, Russiа |
| Kinemat. fiz. nebesnyh tel (Online) 2014, 30(6):27-41 |
| Start Page: Dynamics and Physics of Solar System Bodies |
| Language: Russian |
Abstract: An analysis of medium resolution spectra with λλ =380...540 nm for comet C/2009 P1 (Garradd) was carried out. The observations of the comet were made on 21 March 2012, when it was at heliocentric and geocentric distances of 1.96 AU and 1.36 AU, respectively. The SCORPIO focal reducer attached to the prime focus of the 6-m BTA telescope was used. Emission features of the C2, C3, CN, NH2, CH, CH+, and CO+ species in the cometary coma were identified. The total number of the detected emission features was 148. The gas production rates of the C2, C3, and CN radicals were derived using the Haser model. The lg[Q(C2)/Q(CN)] and lg[Q(C3)/Q(CN)] gas production ratio was equal to 0.26 and –1.09, respectively. The gas production was 4.84·1026 mol/s for C2 molecule and 2.16·1025 mol/s for C3 molecule. |
| Keywords: C/2009 P1 (Garradd), gas production, сomet |
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