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Výsledek výzkumu

Design of the broadcast ephemerides for the Lunar Communication and Navigation Services system

six Keplerian elements together with nine empirical accelerations or Chebyshev, i.e., 576, when compared to the Keplerian elements and empirical accelerations with 401 bits. On the other hand, the Keplerian

Earth and related environmental sciences

  • 2024
  • Jimp
  • Odkaz
Výsledek výzkumu

Effective Geometry of the Bardeen Spacetimes: Gravitational Lensing and Frequency Mapping of Keplerian Disks

We study the appearance of Keplerian accretion disks in order to demonstrate and frequency shifting of the images of the Keplerian disks. We focus our attention representing an NED. Photons governing the appearance of the Kepler...

Astronomy (including astrophysics,space science)

  • 2019
  • Jimp
  • Odkaz
Výsledek výzkumu

Optical effects related to Keplerian discs orbiting Kehagias-Sfetsos naked singularities

to the 'antigravity' effect, which causes an internal static sphere surrounded by Keplerian discs. We focus our attention on the optical effects related to the Keplerian accretion discs, constructing the optical appearance of the <...

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2014
  • Jx
  • Odkaz
Výsledek výzkumu

Decadal evolution of GPS, GLONASS, and Galileo mean orbital elements

in Keplerian elements by averaging them over several complete revolutions forming mean orbital elements giving an explanation of the main perturbing forces for each Keplerian parameter. The combined International ...

Earth and related environmental sciences

  • 2024
  • Jimp
  • Odkaz
Výsledek výzkumu

Efficiency of the Keplerian accretion in braneworld Kerr-Newman spacetimes and mining instability of some naked singularity spacetimes

governing the Keplerian accretion. We determine the efficiency of the Keplerian)}), implying unbound efficiency of the Keplerian accretion and the possibility......

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2016
  • Jx
  • Odkaz
Výsledek výzkumu

Counter-rotating Keplerian discs around Kerr superspinars

The appearance of corotating Keplerian discs orbiting Kerr superspinars has been shown to be strongly dependent on the value of the superspinar spin in both that self-illumination is irrelevant for counter-rotating Keplerian discs o...

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2012
  • Jx
  • Odkaz
Výsledek výzkumu

Disks Surrounding Be stars: A Stellar Evolution Perspective

There is evidence that at least some stars undergoing the Be phenomenon are single, almost critically rotating stars surrounded by viscous Keplerian disks. (2011) describing the properties of a stationary viscous Keplerian disk surr...

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2012
  • D
Výsledek výzkumu

The imprints of ghost images in astrophysical phenomena

in the profiles of spectral lines generated by Keplerian disks.

Astronomy (including astrophysics,space science)

  • 2018
  • D
  • Odkaz
Výsledek výzkumu

Radial and vertical epicyclic frequencies of Keplerian motion in the field of Kerr naked singularities. Comparison with the black hole case and possible instability of naked-singularity accretion

Relativistic Keplerian orbital frequency (?K) and related epicyclic frequencies (radial ?r, vertical ??) play an important role in the physics of accretion discs orbiting Kerr black holes ? quasiperiodic oscillations observed in microquasars...

BE - Teoretická fyzika

  • 2005
  • Jx
Výsledek výzkumu

Quasi-Keplerian parametrization for eccentric compact binaries in scalar-tensor theories at second post-Newtonian order and applications

The generalized quasi-Keplerian parametrization for compact binaries on eccentric bound orbits is established at second post-Newtonian (2PN) order in a class of massless scalar-tensor theories. This result is used to compute the orbit-averag...

Particles and field physics

  • 2024
  • Jimp
  • Odkaz
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