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Clues in Zodiacal Light Observations for a Dust Ring Along the Earth's Orbit

Published online by Cambridge University Press:  27 February 2018

J.B. Renard
Affiliation:
LPCE-CNRS, 3A av. Recherche Scientifique, 45071 Orléans, France
R Dumont
Affiliation:
Observatoire de Bordeaux, 33270 Floirac, France
A.C. Levasseur-Regourd
Affiliation:
Paris 6 / Service d'Aéronomie, 91371 Verrières, France
E. Hadamcik
Affiliation:
Paris 6 / Service d'Aéronomie, 91371 Verrières, France

Abstract

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The ability of the Earth to trap interplanetary grains into a dust ring lying along the terrestrial orbit was shown by numerical simulations and confirmed by infrared observations (IRAS, COBE). Such a ring could have its signature on the elongation dependence of the zodiacal brightness along the ecliptic, especially near 90° of the Sun. Indeed, the elongation dependence observed at Tenerife by Dumont and Sanchez (1975) shows that the space density of interplanetary dust slightly increases with increasing heliocentric distance, within the 2 or 3 hundredths of AU approaching Earth's orbit.

Type
IX. Zodiacal Light and Thermal Emission
Copyright
Copyright © Astronomical Society of the Pacific 1996

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