Results 31 to 40 of about 40,224 (152)
On the origin of the B-stars in the Galactic center
, 2014 We present a new directly-observable statistic which uses sky position and proper motion of stars near the Galactic center massive black hole to identify populations with high orbital eccentricities. It is most useful for stars with large orbital periods
Genzel, Reinhard +5 more
core +1 more source
Magnetic sail-based displaced non-Keplerian orbits
Aerospace Science and Technology, 2019 This paper deals with the problem of determining the requirements for the maintenance of circular, displaced, non-Keplerian orbits around the Sun by means of a magnetic sail-based spacecraft.
M. Bassetto, A. Quarta, G. Mengali
semanticscholar +1 more source
Sensitivity Analysis of Chaotic Systems using Unstable Periodic Orbits
, 2018 A well-behaved adjoint sensitivity technique for chaotic dynamical systems is presented. The method arises from the specialisation of established variational techniques to the unstable periodic orbits of the system.
Lasagna, Davide
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Second moment of the Husimi distribution as a measure of complexity of quantum states
, 2001 We propose the second moment of the Husimi distribution as a measure of complexity of quantum states. The inverse of this quantity represents the effective volume in phase space occupied by the Husimi distribution, and has a good correspondence with ...
A. Boros +14 more
core +1 more source
Finite element modelling of perturbed stellar systems [PDF]
, 2010 I formulate a general finite element method (FEM) for self-gravitating stellar systems. I split the configuration space to finite elements, and express the potential and density functions over each element in terms of their nodal values and suitable ...
Agertz +34 more
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Dynamics of Black Hole Pairs I: Periodic Tables
, 2008 Although the orbits of comparable mass, spinning black holes seem to defy simple decoding, we find a means to decipher all such orbits. The dynamics is complicated by extreme perihelion precession compounded by spin-induced precession.
H. Poincaré +3 more
core +1 more source
A New Approach to Earth's Gravity Field Modeling Using GPS-Derived Kinematic Orbits and Baselines
Remote Sensing, 2019 Earth’s gravity field recovery from GPS observations collected by low earth orbiting (LEO) satellites is a well-established technique, and kinematic orbits are commonly used for that purpose.
Xiang Guo, Qile Zhao
semanticscholar +1 more source
, 2008 The recently introduced GALI method is used for rapidly detecting chaos, determining the dimensionality of regular motion and predicting slow diffusion in multi--dimensional Hamiltonian systems. We propose an efficient computation of the GALI$_k$ indices,
Antonopoulos, Chris +2 more
core +2 more sources
Validation of OCO-2 error analysis using simulated retrievals
Atmospheric Measurement Techniques, 2018 . Characterization of errors and sensitivity in remotely sensed observations of greenhouse gases is necessary for their use in estimating regional-scale fluxes.
S. Kulawik +3 more
semanticscholar +1 more source
The curiously warped mean plane of the Kuiper belt
, 2017 We measured the mean plane of the Kuiper belt as a function of semi-major axis. For the classical Kuiper belt as a whole (the non-resonant objects in the semi-major axis range 42--48~au), we find a mean plane of inclination $i_m=1.8^{\circ}$$^{+0.7 ...
Malhotra, Renu, Volk, Kathryn
core +1 more source