Results 101 to 110 of about 24,888 (220)

Innermost stable circular orbits and epicyclic frequencies around a magnetized neutron star

Universitas Scientiarum, 2013
A full-relativistic approach is used to compute the radius of the innermost stable circular orbit (ISCO), the Keplerian, frame-dragging, precession and oscillation frequencies of the radial and vertical motions of neutral test particles orbiting the ...
Andrés F. Gutiérrez-Ruiz, Leonardo A. Pachón, César A. Valenzuela-Toledo   +2 more
doaj   +1 more source

Trajectory Control During an Aeroassisted Maneuver Between Coplanar Circular Orbits

Journal of Aerospace Technology and Management, 2014
This paper presents the simulation results of an aeroassisted maneuver around the Earth, between coplanar circular orbits, from a geostationary orbit to a low orbit.
Willer Gomes dos Santos, Evandro Marconi Rocco, Valdemir Carrara   +2 more
doaj  

Characterisation of Resident Space Objects and Synchronisation Error Compensation in Multistatic Interferometric Inverse Synthetic Aperture Radar Imaging

IET Radar, Sonar & Navigation
This article presents a study on interferometric inverse synthetic aperture radar (ISAR) for three‐dimensional imaging and rotational velocity estimation.
Manjunath Thindlu Rudrappa, Martin Käske, Marcus Albrecht, Peter Knott   +3 more
doaj   +1 more source

A Pedagogical Discussion Concerning the Gravitational Energy Radiated by Keplerian Systems

, 2009
We first discuss the use of dimensional arguments (and of the quadrupolar emission hypothesis) in the derivation of the gravitational power radiated on a circular orbit.
Bracco, C., Provost, J. -P., Salati, P.
core   +4 more sources

Testing the No-Hair Theorem with Observations in the Electromagnetic Spectrum. III. Quasi-Periodic Variability

, 2010
According to the no-hair theorem, astrophysical black holes are uniquely described by their masses and spins. An observational test of the no-hair theorem can be performed by measuring at least three different multipole moments of the spacetime of a ...
Abramowicz, Benlloch, Brenneman, Bélanger, Carter, Chan, Dimitrios Psaltis, Doeleman, Fish, Ghez, Ghez, Gillessen, Glampedakis, Hornstein, Hughes, Johannsen, Johannsen, Johannsen, Kato, Kato, Kato, Kluźniak, Li, Mao, Marrone, Okazaki, Ortega-Rodríguez, Penrose, Perez, Psaltis, Psaltis, Reynolds, Sanabria-Goḿez, Silbergleit, Tim Johannsen, van der Klis, Wagoner, Wex, Will, Yusef-Zadeh   +39 more
core   +1 more source

The problem of satellite attitude stabilization in the geomagnetic field

Учёные записки Казанского университета: Серия Физико-математические науки
A satellite moving along a circular Keplerian orbit in near-Earth space was explored, focusing on its attitude stabilization in the orbital coordinate system using the intrinsic magnetic and Lorentz force moments.
V. I. Kalenova, V. M. Morozov, A. A. Tikhonov   +2 more
doaj   +1 more source

Lambda Perturbations of Keplerian Orbits

, 2012
To estimate influence of the "dark energy" on the Keplerian orbits, we solve the general relativistic equations of motion of a test particle in the field of a point-like mass embedded in the cosmological background formed by the Lambda-term with realistic cosmological Robertson-Walker asymptotics at infinity.
openaire   +2 more sources

The Lick-Carnegie Survey: Four New Exoplanet Candidates

, 2010
We present new precise HIRES radial velocity (RV) data sets of five nearby stars obtained at Keck Observatory. HD 31253, HD 218566, HD 177830, HD 99492 and HD 74156 are host stars of spectral classes F through K and show radial velocity variations ...
Barnes, Barnes, Barnes, Benedict, Bennett, Bryden, Butler, Charbonneau, Charbonneau, Dawson, Eugenio J. Rivera, Gregory Laughlin, Henry, Ida, Marcy, Meschiari, Nader Haghighipour, Peter Jalowiczor, Press, R. Paul Butler, Rivera, Stefano Meschiari, Steven S. Vogt, Takeda, Tanner, Trilling, Udry, Valenti, Vogt, Vogt, Wittenmyer, Wright, Wright, Wright   +33 more
core   +1 more source

POINTING ALGORITHM FOR REENTRY ORBIT INJECTION WITH UNCONTROLLED LAST STAGE DOI 10.5028/jatm.2012.04031112

Journal of Aerospace Technology and Management, 2012
An essencial requirement for a launcher with uncontrolled last stage is to compute the ignition time of that stage and its attitude, in order to obtain a proper orbit transfer from a nonpropelled trajectory to a desired orbit, since such stage it cannot ...
Flávio Eler de Melo, Waldemar de Castro Leite Filho, Hilton Cleber Pietrobom   +2 more
doaj  

The Effect of Offsets from True Orbital Parameters on Exoplanet High-resolution Transmission Spectra

The Astronomical Journal
High-resolution spectroscopy (HRS) plays a crucial role in characterizing exoplanet atmospheres, revealing detailed information about their chemical composition, temperatures, and dynamics.
Yasmine J. Meziani, Laura Flagg, Jake D. Turner, Emily K. Deibert, Ray Jayawardhana, Adam B. Langeveld, Ernst J. W. de Mooij   +6 more
doaj   +1 more source