Libration (molecule)
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Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data Open
The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell. However, the interpretation of gravity, shape, and libration data le…
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On the ridges, undulations & streams in Gaia DR2: Linking the topography of phase-space to the orbital structure of an N-body bar Open
We explore the origin of phase-space substructures revealed by the second Gaia data release in the disc of the Milky Way, such as the ridges in the Vφ-r plane, the undulations in the Vφ-r-Vr space and the streams in the Vφ-Vr plane. We use…
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Secular dynamics of an exterior test particle: the inverse Kozai and other eccentricity–inclination resonances Open
The behavior of an interior test particle in the secular 3-body problem has\nbeen studied extensively. A well-known feature is the Lidov-Kozai resonance in\nwhich the test particle's argument of periapse librates about $\\pm 90^\\circ$\nan…
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Exploring the Absorption Spectrum of Simulated Water from MHz to Infrared Open
Absorption spectra of liquid water at 300 K are calculated from both classical and density functional theory molecular dynamics simulation data, which together span from 1 MHz to hundreds of THz, agreeing well with experimental data qualit…
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Mean Motion Resonances at High Eccentricities: The 2:1 and the 3:2 Interior Resonances Open
Mean motion resonances (MMRs) play an important role in the formation and evolution of planetary systems and have significantly influenced the orbital properties and distribution of planets and minor planets in the solar system and in exop…
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Libration‐driven flows in ellipsoidal shells Open
Planets and satellites can undergo physical librations, which consist of forced periodic variations in their rotation rate induced by gravitational interactions with nearby bodies. This mechanical forcing may drive turbulence in interior f…
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On the perturbed restricted three-body problem Open
In this survey paper we offer an analytical study regarding the perturbed planar restricted three-body problem in the case that the three involved bodies are oblate. The existence of libration points and their linear stability are explored…
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Periodic orbits around the collinear libration points Open
The locations for the collinear libration points in the framework of the restricted three-body problem are determined when the bigger primary is a triaxial rigid body.The analysis of the periodic motion around these points is performed and…
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On the libration collinear points in the restricted three – body problem Open
In the restricted problem of three bodies when the primaries are triaxial rigid bodies, the necessary and sufficient conditions to find the locations of the three libration collinear points are stated. In addition, the Linear stability of …
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Orbital dynamics of circumbinary planets Open
We investigate the dynamics of a non-zero mass, circular orbit planet around an eccentric orbit binary for various values of the binary eccentricity, binary mass fraction, planet mass, and planet semimajor axis by means of numerical simula…
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Extension of Earth-Moon libration point orbits with solar sail propulsion Open
This paper presents families of libration point orbits in the Earth-Moon system that originate from complementing the classical circular restricted three-body problem with a solar sail. Through the use of a differential correction scheme i…
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Dynamics of axial torsional libration under the mantle‐inner core gravitational interaction Open
The aims of this paper are (i) formulating the dynamics of the mantle‐inner core gravitational (MICG) interaction in terms of the spherical‐harmonic multipoles of mass density. The modeled MICG system is composed of two concentric rigid bo…
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The onset of instability in resonant chains Open
There is evidence that most chains of mean motion resonances of type k:k − 1 among exoplanets become unstable once the dissipative action from the gas is removed from the system, particularly for large N (the number of planets) and k (indi…
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The Global Shape, Gravity Field, and Libration of Enceladus Open
In order to improve our understanding of the interior structure of Saturn's small moon Enceladus, we reanalyze radiometric tracking and onboard imaging data acquired by the Cassini spacecraft during close encounters with the moon. We compu…
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Resonance capture and dynamics of three-planet systems Open
We present a series of dynamical maps for fictitious three-planet systems in initially circular coplanar orbits. These maps have unveiled a rich resonant structure involving two or three planets, as well as indicating possible migration ro…
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Libration points in the restricted three-body problem: Euler angles, existence and stability Open
The objective of the present paper is to study in an analytical way the existence and the stability of the libration points, in the restricted three-body problem, when the primaries are triaxial rigid bodies in the case of the Euler angles…
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Orbital stability of Earth Trojans Open
The only discovery of Earth Trojan 2010 TK 7 and the subsequent launch of OSIRIS-REx have motived us to investigate the stability around the triangular Lagrange points of the Earth, L 4 and L 5 . In this paper we present detailed dynamical…
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TOI-216b and TOI-216 c: Two Warm, Large Exoplanets in or Slightly Wide of the 2:1 Orbital Resonance Open
Warm, large exoplanets with 10–100 day orbital periods pose a major challenge to our understanding of how planetary systems form and evolve. Although high eccentricity tidal migration has been invoked to explain their proximity to their ho…
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The dynamical environment of asteroid 21 Lutetia according to different internal models Open
Made available in DSpace on 2018-11-28T03:51:16Z (GMT). No. of bitstreams: 0\n Previous issue date: 2017-01-01
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Precise Transit and Radial-velocity Characterization of a Resonant Pair: The Warm Jupiter TOI-216c and Eccentric Warm Neptune TOI-216b Open
Warm, large exoplanets with 10-100 day orbital periods pose a major challenge to our understanding of how planetary systems form and evolve. Precise characterization of their masses and radii, orbital properties, and resonant behavior can …
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Dynamic modeling and analysis of the looped space tether transportation system based on ANCF Open
A high‐fidelity multibody‐system dynamic model of the looped tether transportation system (L‐TTS) is proposed in this study to study its large deformation as well as large overall motion. The absolute nodal coordinate formulation (ANCF)‐ba…
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Coherent libration to coherent rotational dynamics via chimeralike states and clustering in a Josephson junction array Open
An array of excitable Josephson junctions under a global mean-field interaction and a common periodic forcing shows the emergence of two important classes of coherent dynamics, librational and rotational motion, in the weaker and stronger …
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Periodic and quasi-periodic attractors for the spin–orbit evolution of Mercury with a realistic tidal torque Open
In this paper, we make a detailed study of the spin–orbit dynamics of Mercury, as predicted by the realistic model that has been recently introduced in a series of papers mainly by Efroimsky and Makarov. We present numerical and analytical…
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Fluid Dynamics Experiments for Planetary Interiors Open
Understanding fluid flows in planetary cores and subsurface oceans, as well as their signatures in available observational data (gravity, magnetism, rotation, etc.), is a tremendous interdisciplinary challenge. In particular, it requires u…
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Libration-driven inertial waves and mean zonal flows in spherical shells Open
Several planetary bodies in our solar system undergo a forced libration owing to gravitational interactions with their orbital companions, leading to complex fluid motions in their metallic liquid cores or subsurface oceans. In this study,…
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Locations of stationary/periodic solutions in mean motion resonances according to the properties of dust grains Open
The equations of secular evolution for dust grains in mean motion resonances with a planet are solved for stationary points. Non-gravitational effects caused by stellar radiation (the Poynting-Robertson effect and the stellar wind) are tak…
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Tidally-forced turbulence in planetary interiors Open
The turbulence generated in the liquid metal cores and subsurface oceans of planetary bodies may be due to the role of mechanical forcing through precession/nutation, libration, tidal forcing and collisions. Here, we model the response of …
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Analysis of Dihydrogen Bonding in Ammonium Borohydride Open
The structural and vibrational properties of ammonium borohydride, NH4BH4, have been examined by first-principles density functional theory (DFT) calculations and inelastic neutron scattering (INS). The H disordered crystal structure of NH…
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Long-Term Evolution of Highly-Elliptical Orbits: Luni-Solar Perturbation Effects for Stability and Re-entry Open
This paper investigates the long-term evolution of spacecraft in Highly Elliptical Orbits (HEOs). The single averaged disturbing potential due to luni-solar perturbations, zonal harmonics of the Earth gravity field is written in mean Keple…
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GJ 357: a low-mass planetary system uncovered by precision radial velocities and dynamical simulations Open
We report the detection of a new planetary system orbiting the nearby M2.5V star GJ 357, using precision radial velocities from three separate echelle spectrographs, High Accuracy Radial velocity Planet Searcher (HARPS), High Resolution Ec…