Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icar..162..337m&link_type=abstract
Icarus, Volume 162, Issue 2, p. 337-343.
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
The position and shape of the Gegenschein's maximum brightness provide information on the structure of the interplanetary dust cloud. We show that the asteroidal dust bands, extended near the anti-solar point, play an important role in determining both the position of the maximum brightness and the shape of the Gegenschein. After removing the asteroidal dust bands from an observation of the Gegenschein on November 2, 1997, it was found that the maximum brightness point shifted -0.4° in ecliptic latitude, i.e., to the south of the ecliptic plane, at an ecliptic longitude of 180°, in contrast to a latitude value of +0.1° when the dust bands were included. Furthermore, the part of the Gegenschein to the south of the ecliptic plane was brighter than the northern part at the time of observation. Referring to the cloud model of , Astrophy. J. 508, 44-73), it can be estimated that the ascending node of the symmetry plane of the dust cloud is 57°-3°+7° when its inclination is 2.03° -/+ 0.50°.
Fujino Masanori
Ishiguro Masateru
Kwon Suk Minn
Mukai Tadashi
Nakamura Ryosuke
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