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Mars nutation resonance due to Free Inner Core Nutation [PDF]
Journal of Geophysical Research E: Planets, 2003 The rotational normal modes of the planet Mars are computed using a numerical approach. We deduce the associated resonances in the nutations induced by the external gravitational forcing from the Sun, Phobos, and Deimos. In particular, the influence of a possible solid inner core inside a liquid core is investigated.
Pascale Defraigne +2 more
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The Dynamics of Plant Nutation [PDF]
Scientific Reports, 2020 Abstract In this article we advance a cutting-edge methodology for the study of the dynamics of plant movements of nutation. Our approach, unlike customary kinematic analyses of shape, period, or amplitude, is based on three typical signatures of adaptively controlled processes and motions, as reported in the ...
Raja, Vicente +3 more
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Nutation resonance in ferromagnets [PDF]
Physical Review B, 2020 The inertial dynamics of magnetization in a ferromagnet is investigated theoretically. The analytically derived dynamic response upon microwave excitation shows two peaks: ferromagnetic and nutation resonances. The exact analytical expressions of frequency and linewidth of the magnetic nutation resonance are deduced from the frequency dependent ...
Mikhail Cherkasskii +2 more
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About the Free and Forced Nutation: The Daily Nutation [PDF]
American Journal of Astronomy and Astrophysics, 2021 To explain the nutation phenomenon, Euler chose a geocentric frame of coordinates to present his dynamical equations. In accordance with his formulas, the nutation is caused by a momentum relative to the Earth's center, due to certain external forces. Further, Poinsot presented a special case of the Euler's equations, when any momentum of those certain
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Nutation and Reference Frame [PDF]
Highlights of Astronomy, 1995 The reference frames are of fundamental importance in all kinds of the precession and nutation studies involving the theory, the coordinate transformation and the observations. The aim of this paper is to review all the frames used in such studies and to lead to a better consistency between them in order that theory and reductions of observations be ...
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The Earth's Constitution and the Nutations [PDF]
Symposium - International Astronomical Union, 1980 The theoretical researches on this subject were first developed in a consistent theory, in 1765, by Euler, who studied the theory of the motion of a rotating rigid body. Bradley shortly before, in 1737, had discovered the first forced nutation, with a period of 18.6 years, which was explained by d'Alembert.
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Nutation and the Oppolzer's Terms [PDF]
Symposium - International Astronomical Union, 1980 Two fundamental frames of reference are used in the study of the rotation of the Earth: the nonrotating celestial coordinate system XYZ attached to the directions to stars and/or extragalactic sources, and the terrestrial coordinate system xyz attached in “a prescribed way” to several points (observatories) on the surface of the Earth or to the pencil ...
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The Calculation of the Nutations [PDF]
Highlights of Astronomy, 1974 It is well known that the knowledge of precession and nutation is essential for the computation of astronomical coordinates and the comparison of values obtained at different dates. It is therefore important to compute the nutations from the best available observations.Unfortunately, there are not many long series of reliable observations that can be ...
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The Nutation of Helianthus [PDF]
Botanical Gazette, 1900 Volume: 29 ; Start Page: 197 ; End Page ...
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Nutation in Space and Diurnal Nutation in the Case of an Elastic Earth [PDF]
Symposium - International Astronomical Union, 1979 In order to improve the representation of nutation, the effect of elasticity of the Earth on the nutation in space and diurnal nutation of the terrestrial rotation axis is considered and its amplitude is evaluated for the principal terms. The choice between several methods taking this effect into account is discussed.
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