Accurate computation of gravitational field of a tesseroid
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Geodesy"
DOI: 10.1007/s00190-018-1126-2
Abstract: We developed an accurate method to compute the gravitational field of a tesseroid. The method numerically integrates a surface integral representation of the gravitational potential of the tesseroid by conditionally splitting its line integration intervals… read more here.
Keywords: tesseroid; surface; gravitational field; method ... See more keywords
1:1 Ground-track resonance in a uniformly rotating 4th degree and order gravitational field
Sign Up to like & getrecommendations! Published in 2017 at "Celestial Mechanics and Dynamical Astronomy"
DOI: 10.1007/s10569-016-9717-9
Abstract: Using a gravitational field truncated at the 4th degree and order, the 1:1 ground-track resonance is studied. To address the main properties of this resonance, a 1-degree of freedom (1-DOF) system is firstly studied. Equilibrium… read more here.
Keywords: degree order; resonance; gravitational field; ground track ... See more keywords
Reaction of elastic media environment on the variation of the gravitational field
Sign Up to like & getrecommendations! Published in 2019 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-019-2613-3
Abstract: In this paper, the results of theoretical calculations within the elastodynamic models of Maugin and Weber are applied to the study of the influence of variations of the geopotential on the frequency of generation of… read more here.
Keywords: media environment; field; gravitational field; environment variation ... See more keywords
Generalized Dirac Equation for a particle in a gravitational field
Sign Up to like & getrecommendations! Published in 2021 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-021-02834-y
Abstract: The existence of a minimal observable length modifies the Heisenberg’s uncertainty principle at Plank scales and leads to some modifications of the Dirac equation. Here, we consider the generalized uncertainty principle (GUP) theory in order… read more here.
Keywords: dirac equation; generalized dirac; gravitational field; equation ... See more keywords
Invariant relative orbits for spacecraft formation flying in high-order gravitational field
Sign Up to like & getrecommendations! Published in 2021 at "Acta Astronautica"
DOI: 10.1016/j.actaastro.2021.08.027
Abstract: abstract This study addresses the boundary and fluctuation of invariant relative orbits for spacecraft formation flying in a high-order gravitational field. The invariant relative condition is analyzed to obtain the analytical boundary. To ensure the… read more here.
Keywords: orbits spacecraft; invariant relative; gravitational field; relative orbits ... See more keywords
Quantum gravitomagnetic clock effect in Kerr gravitational field
Sign Up to like & getrecommendations! Published in 2021 at "New Astronomy"
DOI: 10.1016/j.newast.2020.101547
Abstract: Abstract We have found an approximate solution of Dirac equation using Foldy-Wouthuysen-Tani Hamiltonian of a Dirac particle in the Kerr gravitational field. We have solved the equation approximately using time-independent perturbation theory for the positive… read more here.
Keywords: clock effect; kerr gravitational; gravitational field; gravitomagnetic clock ... See more keywords
Crustal density and global gravitational field estimation of the Moon from GRAIL and LOLA satellite data
Sign Up to like & getrecommendations! Published in 2020 at "Planetary and Space Science"
DOI: 10.1016/j.pss.2020.105032
Abstract: Abstract We employ Newton's integral in the spectral domain to solve two geodetic/geophysical tasks for the Moon. Firstly, we determine 3D bulk density distribution within the lunar crust (inverse problem). For this purpose, we develop… read more here.
Keywords: satellite; gravitational field; density; model ... See more keywords
Effect of sample height and particle elongation in the sedimentation of colloidal rods.
Sign Up to like & getrecommendations! Published in 2023 at "Soft matter"
DOI: 10.1039/d3sm00191a
Abstract: We study theoretically the effect of a gravitational field on the equilibrium behaviour of a colloidal suspension of rods with different length-to-width aspect ratios. The bulk phases of the system are described with analytical equations… read more here.
Keywords: colloidal; effect; sample height; sedimentation ... See more keywords
Modeling urban growth in a metropolitan area based on bidirectional flows, an improved gravitational field model, and partitioned cellular automata
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Geographical Information Science"
DOI: 10.1080/13658816.2018.1562067
Abstract: ABSTRACT Simulating urban landscape dynamics in metropolitan areas has attracted much attention lately, but the difficulty remains. Although large-scale urban simulation studies consider spatial interaction as an important factor, spatial interaction cannot be accurately measured… read more here.
Keywords: spatial interaction; improved gravitational; gravitational field; model ... See more keywords
Testing the gravitational field generated by a quantum superposition
Sign Up to like & getrecommendations! Published in 2019 at "New Journal of Physics"
DOI: 10.1088/1367-2630/ab41c1
Abstract: What gravitational field is generated by a massive quantum system in a spatial superposition? Despite decades of intensive theoretical and experimental research, we still do not know the answer. On the experimental side, the difficulty… read more here.
Keywords: field generated; gravitational field; generated quantum; testing gravitational ... See more keywords
The gravitational field of a star in quadratic gravity
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/08/050
Abstract: The characterization of the gravitational field of isolated objects is still an open question in quadratic theories of gravity. We study static equilibrium solutions for a self-gravitating fluid in extensions of General Relativity including terms… read more here.
Keywords: field star; star quadratic; quadratic gravity; gravitational field ... See more keywords