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Title: Size Dependence of Dust Distribution around the Earth Orbit

Abstract

In the solar system, interplanetary dust particles (IDPs) originating mainly from asteroid collisions and cometary activities drift to Earth orbit due to Poynting–Robertson drag. We analyzed the thermal emission from IDPs that was observed by the first Japanese infrared astronomical satellite, AKARI . The observed surface brightness in the trailing direction of the Earth orbit is 3.7% greater than that in the leading direction in the 9 μ m band and 3.0% in the 18 μ m band. In order to reveal dust properties causing leading–trailing surface brightness asymmetry, we numerically integrated orbits of the Sun, the Earth, and a dust particle as a restricted three-body problem including radiation from the Sun. The initial orbits of particles are determined according to the orbits of main-belt asteroids or Jupiter-family comets. Orbital trapping in mean motion resonances results in a significant leading–trailing asymmetry so that intermediate sized dust (∼10–100 μ m) produces a greater asymmetry than zodiacal light. The leading–trailing surface brightness difference integrated over the size distribution of the asteroidal dust is obtained to be 27.7% and 25.3% in the 9 μ m and 18 μ m bands, respectively. In contrast, the brightness difference for cometary dust is calculated as 3.6%more » and 3.1% in the 9 μ m and 18 μ m bands, respectively, if the maximum dust radius is set to be s {sub max} = 3000 μ m. Taking into account these values and their errors, we conclude that the contribution of asteroidal dust to the zodiacal infrared emission is less than ∼10%, while cometary dust of the order of 1 mm mainly accounts for the zodiacal light in infrared.« less

Authors:
;  [1]; ; ; ;  [2]
  1. Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Meguro, Tokyo, 152-8551 (Japan)
  2. Graduate School of Science, Nagoya University, Nagoya, Aichi, 464-8602 (Japan)
Publication Date:
OSTI Identifier:
22663664
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 153; Journal Issue: 5; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTEROIDS; BRIGHTNESS; COMETS; COSMIC DUST; INTERPLANETARY SPACE; JUPITER PLANET; ORBITS; PARTICLES; SATELLITES; SOLAR SYSTEM; SUN; SURFACES; THREE-BODY PROBLEM; TRAPPING; ZODIACAL LIGHT

Citation Formats

Ueda, Takahiro, Takeuchi, Taku, Kobayashi, Hiroshi, Ishihara, Daisuke, Kondo, Toru, and Kaneda, Hidehiro, E-mail: t.ueda@geo.titech.ac.jp. Size Dependence of Dust Distribution around the Earth Orbit. United States: N. p., 2017. Web. doi:10.3847/1538-3881/AA5FF3.
Ueda, Takahiro, Takeuchi, Taku, Kobayashi, Hiroshi, Ishihara, Daisuke, Kondo, Toru, & Kaneda, Hidehiro, E-mail: t.ueda@geo.titech.ac.jp. Size Dependence of Dust Distribution around the Earth Orbit. United States. doi:10.3847/1538-3881/AA5FF3.
Ueda, Takahiro, Takeuchi, Taku, Kobayashi, Hiroshi, Ishihara, Daisuke, Kondo, Toru, and Kaneda, Hidehiro, E-mail: t.ueda@geo.titech.ac.jp. Mon . "Size Dependence of Dust Distribution around the Earth Orbit". United States. doi:10.3847/1538-3881/AA5FF3.
@article{osti_22663664,
title = {Size Dependence of Dust Distribution around the Earth Orbit},
author = {Ueda, Takahiro and Takeuchi, Taku and Kobayashi, Hiroshi and Ishihara, Daisuke and Kondo, Toru and Kaneda, Hidehiro, E-mail: t.ueda@geo.titech.ac.jp},
abstractNote = {In the solar system, interplanetary dust particles (IDPs) originating mainly from asteroid collisions and cometary activities drift to Earth orbit due to Poynting–Robertson drag. We analyzed the thermal emission from IDPs that was observed by the first Japanese infrared astronomical satellite, AKARI . The observed surface brightness in the trailing direction of the Earth orbit is 3.7% greater than that in the leading direction in the 9 μ m band and 3.0% in the 18 μ m band. In order to reveal dust properties causing leading–trailing surface brightness asymmetry, we numerically integrated orbits of the Sun, the Earth, and a dust particle as a restricted three-body problem including radiation from the Sun. The initial orbits of particles are determined according to the orbits of main-belt asteroids or Jupiter-family comets. Orbital trapping in mean motion resonances results in a significant leading–trailing asymmetry so that intermediate sized dust (∼10–100 μ m) produces a greater asymmetry than zodiacal light. The leading–trailing surface brightness difference integrated over the size distribution of the asteroidal dust is obtained to be 27.7% and 25.3% in the 9 μ m and 18 μ m bands, respectively. In contrast, the brightness difference for cometary dust is calculated as 3.6% and 3.1% in the 9 μ m and 18 μ m bands, respectively, if the maximum dust radius is set to be s {sub max} = 3000 μ m. Taking into account these values and their errors, we conclude that the contribution of asteroidal dust to the zodiacal infrared emission is less than ∼10%, while cometary dust of the order of 1 mm mainly accounts for the zodiacal light in infrared.},
doi = {10.3847/1538-3881/AA5FF3},
journal = {Astronomical Journal (Online)},
number = 5,
volume = 153,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}