Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mmkyo..35..131h&link_type=abstract
Kyoto University, Faculty of Science, Memoirs, Series - Physics, Astrophysics, Geophysics and Chemistry, vol. 35, Sept. 1977, p.
Astronomy and Astrophysics
Astrophysics
Angular Momentum, Interplanetary Dust, Particle Spin, Conductive Heat Transfer, Light Emission, Orbital Elements, Poynting-Robertson Effect, Thermal Radiation
Scientific paper
The paper is concerned with the effects of the rotary spinning of interplanetary dust on dust motion with respect to the sun. The dayside of nonspinning dust absorbs sunlight and subsequently emits it in such a way that the angular momentum of the dust is decreased; however, if the dust is spinning, the emitted light has a tangential component which might increase the angular velocity of the dust. In an analysis of this phenomenon it is found that the spin effect increases as the dust size increases and the distance to the sun decreases. Equations of the heat conduction of a rotating sphere under the irradiation of sunlight as well as numerical results are obtained. The spin effect causes a change in the magnitude of an orbital angular momentum, a change in the inclination of the orbital plane, and precession of the orbital angular momentum. It is thought that if spin is maintained, the dust will not fall into the sun.
Fujiwara Akira
Hasegawa Hidenao
Koike Chiyoe
Mukai Tadashi
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