The Zodiacal Cloud Complex

Levasseur-Regourd, A. C.; Renard, Jean‐Baptiste; Dumont, René

doi:10.1007/978-94-011-3640-2_28

Cited by 50 publications

(32 citation statements)

References 23 publications

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“…Also, interstellar dust particles entering the solar system, as identified by the dust experiment on the Ulysses space probe (Grün et al 1993) could leave their imprint in the data. Indeed, Renard et al (1995), based on IRAS observations of the zodiacal light, concluded that there should be at least two different populations: a low albedo, high polarisation one close to the ecliptic, and a more randomly distributed component with higher albedo and lower polarisation (Levasseur-Regourd 1991), and they suggested to identify these with particles of asteroidal and cometary origin, respectively. As already mentioned, Reach et al (1996b) pointed out the possibility that a silicate feature around 10 µm might be present in the zodiacal light spectrum.…”

Section: Discussionmentioning

confidence: 99%

Mid-infrared spectrum of the zodiacal light observed with ISOPHOT

Leinert

Ábrahám

Acosta–Pulido

et al. 2002

A&A

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Abstract. We present 29 mid-infrared spectra of the zodiacal light distributed over the sky. The observed 5.9-11.7 µm spectral shapes are well represented by blackbody radiation with colour temperatures in the range of 255 ≤ T ≤ 300 K. The spectra are smooth and featureless. The variation of the temperature can be explained by the geometrical distribution of dust in the inner solar system. This result indicates that although the interplanetary dust particles originate from discrete sources (comets, asteroids) the interplanetary cloud of today seems to be well mixed in terms of grain composition and size distribution.

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Section: Discussionmentioning

confidence: 99%

Mid-infrared spectrum of the zodiacal light observed with ISOPHOT

Leinert

Ábrahám

Acosta–Pulido

et al. 2002

A&A

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“…The optical properties of the zodiacal cloud and the study of the dust bands detected by the IRAS satellite indicate that the zodiacal cloud is made of a mixture of asteroidal and cometary dust, which should both contribute to the flux of interplanetary dust accreted by the Earth (Levasseur-Regourd et al, 1991;Liou et al, 1995, and references therein). Liou et al (1995) proposed that the shape of the zodiacal cloud, as observed by IRAS, can be accounted for by a combination of one-fourth to one-third asteroidal dust and about three-fourths to two-thirds cometary dust.…”

Section: Preliminary Implicationsmentioning

confidence: 99%

Carbonaceous micrometeorites from Antarctica

Engrand

Maurette

1998

Meteorit & Planetary Scien

186

162

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Abstract-Over 100 000 large interplanetary dust particles in the 50-500 pm size range have been recovered in clean conditions from -600 tons of Antarctic melt ice water as both unmelted and partially melteddehydrated micrometeorites and cosmic spherules. Flux measurements in both the Greenland and Antarctica ice sheets indicate that the micrometeorites deliver to the Earth's surface -2OOOx more extraterrestrial material than brought by meteorites. Mineralogical and chemical studies of Antarctic micrometeorites indicate that they are only related to the relatively rare CM and CR carbonaceous chondrite groups, being mostly chondritic carbonaceous objects composed of highly unequilibrated assemblages of anhydrous and hydrous minerals. However, there are also marked differences between these two families of solar system objects, including higher C/O ratios and a very marked depletion of chondrules in micrometeorite matter; hence, they are "chondrites-without-chondrules." Thus, the parent meteoroids of micrometeorites represent a dominant and new population of solar system objects, probably formed in the outer solar system and delivered to the inner solar system by the most appropriate vehicles, comets. One of the major purposes of this paper is to discuss applications of micrometeorite studies that have been previously presented to exobiologists but deal with the synthesis of prebiotic molecules on the early Earth, and more recently, with the early history of the solar system.

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“…The evolution of the local physical properties with elevation confirms the heterogeneity of the zodiacal cloud out of its symmetry plane. The variations of the properties of the grains explain the differences between the various models (fitting visual or thermal observations) and suggest a dust population from different origins (Levasseur-Regourd et al, 1991).…”

Section: In the Tangential Planementioning

confidence: 96%

“…Gradients of intensity and temperature with solar distance are obtained (LevasseurRegourd, 1990), as well as a curve describing the evolution of local intensity with phase angle (Levasseur-Regourd et al, 1991). It is then possible to normalize the local contributions at constant phase angle and solar distance .…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Interplanetary Dust in the Tangential Plane

Renard¹,

Levasseur-Regourd²,

Dumont

1991

International Astronomical Union Colloquium

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ABSTRACT. Local intensity and emissivity, and consequently local polarization degree, temperature and albedo, can be retrieved from optical and thermal observations of zodiacal light. The local polarization degree (normalized at constant solar distance and phase angle) is found to decrease with elevation above the symmetry plane of the zodiacal cloud. The heterogeneity of the cloud, established towards the symmetry pole, is here demonstrated in the tangential plane (almost perpendicular to the ecliptic plane at 1 AU). We present a map of the local polarization degree in this plane.

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The Zodiacal Cloud Complex

Cited by 50 publications

References 23 publications

Mid-infrared spectrum of the zodiacal light observed with ISOPHOT

Mid-infrared spectrum of the zodiacal light observed with ISOPHOT

Carbonaceous micrometeorites from Antarctica

Optical Properties of Interplanetary Dust in the Tangential Plane

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