Abstract
Polarimetric observations of the light scattered by dust have been carried out at Pic-du-Midi Observatory with the 2 m telescope in June and September–October 1996, and at Haute-Provence Observatory with the 0.80 m telescope in April 1997. They cover a total number of 11 nights and a large (6.9°–47.7°) phase angle range. The spatial resolution allows to underline structures in the coma, as well in the brightness images as in the polarization maps, with a correlation between the regions of bright structures and the regions of higher polarization. A clear difference appears between the sunward and antisunward side, with higher polarization on the antisunward side. The phase angle coverage allows us to obtain a polarimetric phase curve for the whole coma and to compare it with other cometary phase curves. The degree of polarization is higher for Hale-Bopp than for the comets previously observed.
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Hadamcik, E., Levassuer-Regourd, A.C. & Renard, J.B. CCD Polarimetric Imaging Of Comet Hale-Bopp (C/1995 O1). Earth, Moon, and Planets 78, 365–371 (1997). https://doi.org/10.1023/A:1006206613959
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DOI: https://doi.org/10.1023/A:1006206613959