Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..526l&link_type=abstract
Astronomy and Astrophysics, Vol.187, NO. 1+2/NOV, P. 526, 1987
Astronomy and Astrophysics
Astrophysics
24
Scientific paper
Measurements of the linear polarization of molecular bands in comets P/Halley and Hartley-Good are presented. The measured bands are the C2 Swan (5140 Å), the CN (3880 Å), the C3 (4060 Å) and the OH (3090 Å). The phase angle dependence of the polarization of C2, C3 and CN is in good agreement with theory. However the polarization of OH is found 5 times smaller than expected. The direction of polarization of C2, C3 and OH is usually perpendicular to the scattering plane, though some measurements are parallel to it. For CN half the measures show significant deviations from the perpendicular to the scattering plane.
Arnaud Jacques
Le Borgne Jean-Franc
Leroy Jean-Louis
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