[PPS03-P22] Update of Imaging Polarimetry Survey on Cometary Dust Coma Activities
Keywords:Comet, Imaging Polarimetry, dust
To study such dust grain activities in cometary coma, we have started the optical imaging polarimetry survey on cometary dust coma activities, by using our instrument called "Polarimetric Imager for COmets (PICO)" . In the early phase of this survey, 0.65-m reflector at Gunma Astronomical Observatory and 1-m telescope at Lulin Observatory, Taiwan, were used for observations. Since 2006, our survey has been performed by using the 0.5-m reflector at Mitaka, National Astronomical Observatory of Japan. Up to now, we observed 26 comets/nuclei in total, including 7 short periodic comets and one pair of split cometary nuclei of 73P/Schwassmann-Wachmann. We present the latest results of our polarimetry survey.
 Ikeda Y. et al. (2007), PASJ, 59, 1017