Gas and dust in Comet 2P/Encke observed in the visual and submillimeter wavelength ranges

• Опубліковано в: : Кинематика и физика небесных тел
• Дата: 2005
• Автори: Jockers, K., Szutowicz, S., Villanueva, G., Kiselev, N., Bonev, T., Hartogh, P.
• Формат: Стаття
• Мова: English
• Опубліковано: Головна астрономічна обсерваторія НАН України 2005
• Теми: MS5: Dynamics and Physics of Solar System Bodies
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/79699
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Gas and dust in Comet 2P/Encke observed in the visual and submillimeter wavelength ranges / K. Jockers, S. Szutowicz, G. Villanueva, N. Kiselev, T. Bonev, P. Hartogh // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 458-464. — Бібліогр.: 18 назв. — англ.

In November 2003 Comet 2P/Encke was observed simultaneously with the 10-m Heinrich–Hertz Submillimeter Telescope on Mount Graham, Arizona, USA, and the 2-m optical telescope on Mount Rozhen, Bulgaria. Simultaneous radio observations of the 4–3 and 3–2 rotational transitions of HCN and the 0–0 transition of the CN violet band system provide a three-dimensional view on the comet. The observations are consistent with outgassing from the source region I with location and pole position of Comet Encke taken from [14]. The outflow speed is 1.2 km. There is some evidence for another possible parent for CN besides HCN. The visual dust coma of Comet Encke is nearly spherical with a diameter of about 1000 km and a slight extension into Comet Encke’s fan. The polarization of the observed NH₂ transition at 662 nm is 7% at a phase angle of 94.5°, close to the value for two-atomic molecules. At this phase angle and a wavelength of 642 nm the polarization of Comet Encke’s dust is greater than 30%, i.e., exceeds the value for so-called dusty comets.