Polarimetric Study of Comets C/1995 O1 (Hale-Bopp) and C/2000 Wm1 (Linear)

Details Polarimetric Study of Comets C/1995 O1 (Hale-Bopp) and C/2000 Wm1 (Linear) Polarimetric Study of Comets C/1995 O1 (Hale-Bopp) and C/2000 Wm1 (Linear)

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002em%26p...90..413j&link_type=abstract

Earth, Moon, and Planets, v. 90, Issue 1, p. 413-421 (2002).

Computer Science

4

Comets, Dust Characteristics, Linear Polarization

Scientific paper

We made polarimetric observations of comet Hale-Bopp covering awide phase angle range, from 18.8 to 47°. At certain phase angles the heliocentricdistance of the comet was less than 1 AU during its pre and post perihelion passages. Oneof the important findings, based on the data in the visual bands, is the higher polarizationwith stronger wavelength dependence compared to comet Halley, indicating the presenceof much finer grains in comet Hale-Bopp. It may also be noted that comet Hale-Bopphas shown highest degree of polarization known so far for any comet and hence fallsin the class of high polarization comets. Polarimetric observations were made of cometC/2000 WM1 (LINEAR)using narrow band (IHW) filters 4845 Å and 7000 Åand broad bands filters BVR during November 23-26, 2001 when the phase angle rangedfrom 15 to 22°. Some of the results based on these observations are presented anddiscussed.

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