Results 321 to 330 of about 6,149,165 (381)

A 62-minute orbital period black widow binary in a wide hierarchical triple

Nature, 2022
Over a dozen millisecond pulsars are ablating low-mass companions in close binary systems. In the original ‘black widow’, the eight-hour orbital period eclipsing pulsar PSR J1959+2048 (PSR B1957+20)1, high-energy emission originating from the pulsar2 is ...
K. Burdge, T. Marsh, J. Fuller, E. Bellm, I. Caiazzo, D. Chakrabarty, M. Coughlin, K. De, V. Dhillon, M. Graham, Pablo Rodr'i guez-Gil, A. Jaodand, David L. Kaplan, E. Kara, A. Kong, S. Kulkarni, Kwan-Lok Li, S. Littlefair, W. Majid, P. Mr'oz, A. Pearlman, E. Phinney, J. Roestel, R. Simcoe, I. Andreoni, A. Drake, R. Dekany, D. Duev, E. Kool, A. Mahabal, M. Medford, R. Riddle, T. Prince   +32 more
semanticscholar   +1 more source

Orbital period cut-off of W UMa-type contact binaries

, 2020
Period cut-off and period–colour relation are two special characters of W UMa-type contact binaries. In the past, many authors noted these two properties, however, a comprehensive study was still lacking.
Xu-Dong Zhang, S. Qian
semanticscholar   +1 more source

Periodic Orbits

Celestial Mechanics, 1984
Recent results on periodic orbits are presented. Planetary systems can be studied by the model of the general 3-body problem and also some satellite systems and asteroid orbits can be studied by the model of the restricted 3-body problem. Triple stellar systems and planetary systems with two Suns are close to periodic systems.
openaire   +2 more sources

Desynchronization by periodic orbits

Physical Review E, 1995
Synchronous chaotic behavior is often interrupted by bursts of desynchronized behavior. We investigate the role of unstable periodic orbits in bursting events and show that they serve as sources of local transverse instability within a synchronous chaotic attractor. Analysis of bursts in both model and experimental studies of two coupled R\"ossler-like
, Heagy, , Carroll, , Pecora
openaire   +2 more sources

Targeting unstable periodic orbits

Physical Review E, 1995
Specific targeting of unstable periodic orbits has been achieved by using large-amplitude perturbations in a dynamical system. The method has been demonstrated experimentally on a ${\mathrm{CO}}_{2}$ laser with modulated losses whose unstable periodic orbits are created either at a period-doubling or at a saddle-node bifurcation.
, Chizhevsky, , Glorieux
openaire   +2 more sources

Periodic Orbits near equilibria

Communications on Pure and Applied Mathematics, 2010
AbstractLyapunov, Weinstein, and Moser obtained remarkable theorems giving sufficient conditions for the existence of periodic orbits emanating from an equilibrium point of a differential system with a first integral. Using averaging theory, we establish a similar result for a differential system without assuming the existence of a first integral.
Barreira, Luis, Llibre, Jaume, Valls, Claudia   +2 more
openaire   +1 more source

STABILIZING HIGHER PERIODIC ORBITS

International Journal of Bifurcation and Chaos, 1994
In this paper, we consider stabilization of chaotic dynamical systems onto higher periodic orbits. We give a necessary and sufficient condition for using local linear state feedback control for this purpose. The control is achieved using small, bounded perturbations, and the method proposed is shown to be effective even in the presence of relatively ...
Paskota, M., Mees, A. I., Teo, K. L.
openaire   +2 more sources

Normal Form Invariants Around Spin-Orbit Periodic Orbits

Celestial Mechanics and Dynamical Astronomy, 2000
The authors consider an oblate satellite orbiting a central planet with \(T_{\text{rev}}\) the period of revolution. The satellite rotates about an internal spin axis with rotational period \(T_{\text{rot}}\). A spin-orbit resonance occurs when the ratio \(T_{\text{rev}}/T_{\text{rot}}\) is a rational number.
CELLETTI, ALESSANDRA, Falcolini, C.
openaire   +4 more sources