Polarimetry, photometry, and spectroscopy of comet C/2009 P1 (Garradd)

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• 作者：Oleksandra Ivanova^a ; ^b ; ^{ivanovaleksandra@gmail.com} ; ^{sandra@mao.kiev.ua} ; Vera Rosenbush^a ; Viktor Afanasiev^c ; Nikolai Kiselev^a ; ^d
• 关键词：Comet C/2009 P1 (Garradd) ; Comets ; coma ; Comets ; dust ; Photometry ; Polarimetry ; Spectroscopy
• 刊名：Icarus
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：284
• 期：Complete
• 页码：167-182
• 全文大小：4837 K
• 卷排序：284

文摘

We present the results of polarimetric, photometric, and spectroscopic observations of comet C/2009 P1 (Garradd) performed in period from February 2 to April 21, 2012. We determined the period of rotation of the cometary nucleus as 11.1 ± 0.8 h. The emission features produced by the C2, C3, CN, CH, NH2 molecules as well as CO+ and H2O+ ions, along with a high level of the dust continuum, were detected in the spectra. An increase in the degree of linear polarization of comet Garradd with the wavelength in the visible domain is revealed. The significant left-handed (negative) circular polarization was detected in the cometary coma.