Results 41 to 50 of about 6,276,609 (285)
Families of Periodic Delay Orbits
Journal of Differential Equations, 2023 21 pages, 11 ...
Peter Albers +2 more
openaire +2 more sources
Orbital maneuver technology of temporary networked satellites for earth exploration
Xibei Gongye Daxue Xuebao, 2022 It is very difficult to achieve effective coverage of hot-spot target in a short time period by earth perturbation for orbital maneuver, because the coverage gap of the temporary multi-satellites network in certain period of time is too large.
ZHAO Jun +5 more
doaj +1 more source
Elemental Abundances of Kepler Objects of Interest in APOGEE. I. Two Distinct Orbital Period Regimes Inferred from Host Star Iron Abundances [PDF]
, 2017 The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has observed ∼600 transiting exoplanets and exoplanet candidates from Kepler (Kepler Objects of Interest, KOIs), most with ≥18 epochs. The combined multi-epoch spectra are of high signal-
Robert F. Wilson +16 more
semanticscholar +1 more source
Revisiting Orbital Evolution in HAT-P-2 b and Confirmation of HAT-P-2 c
The Astronomical Journal, 2023 One possible formation mechanism for Hot Jupiters is that high-eccentricity gas giants experience tidal interactions with their host star that cause them to lose orbital energy and migrate inwards.
Zoë L. de Beurs +7 more
doaj +1 more source
Beyond the periodic orbit theory [PDF]
Nonlinearity, 1998 The global constraints on chaotic dynamics induced by the analyticity of smooth flows are used to dispense with individual periodic orbits and derive infinite families of exact sum rules for several simple dynamical systems. The associated Fredholm determinants are of particularly simple polynomial form.
Cvitanovic, P. +3 more
openaire +5 more sources
Periodic Orbits and Warps [PDF]
Symposium - International Astronomical Union, 1983 Orbit calculations were done in a rotating triaxial system with a density distribution in accordance with recent observations of spiral galaxies. A search was made for simple closed orbits which are tilted with respect to the plane of the galaxy. A family of stable prograde tilted orbits was found which can explain warps as stationary phenomena.
openaire +3 more sources
Periodic orbits in warped disks [PDF]
Astronomy & Astrophysics, 2001 It is often assumed that a warped galaxy can be modeled by a set of rings. This paper verifies numerically the validity of this assumption by the study of periodic orbits populating a heavy self-gravitating warped disk. The phase space structure of a warped model reveals that the circular periodic orbits of a flat disk are transformed in quasi annular ...
Yves Revaz, Daniel Pfenniger
openaire +4 more sources
A Method to Determine BeiDou GEO/IGSO Orbital Maneuver Time Periods
Sensors, 2019 Because there are different types of BeiDou constellations with participating geostationary orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites, the maneuvering frequency of BeiDou satellites is higher than that of other navigation systems ...
Zhiwei Qin +7 more
doaj +1 more source
Magnetic Activity and Orbital Period Study for the Short-period RS CVn–type Eclipsing Binary DV Psc
Astrophysical Journal, 2019 Using 27 sets of new multiband photometry light curves acquired from our long-term photometric campaign carried out in the last 5 yr and high-resolution spectroscopic data from seven nights, we analyzed the physical mechanisms of period variation ...
Q. Pi +7 more
semanticscholar +1 more source
Discovery of a 26.2 day period in the long-term X-ray light curve of SXP 1323: a very short orbital period for a long spin period pulsar [PDF]
, 2017 Context. About 120 Be/X-ray binaries (BeXBs) are known in the Small Magellanic Cloud (SMC); about half of them are pulsating with periods from a few to hundreds of seconds. SXP 1323 is one of the longest-period pulsars known in this galaxy. Aims.
S. Carpano, F. Haberl, R. Sturm
semanticscholar +1 more source