搜索结果: 1-15 共查到“理学 orbit”相关记录88条 . 查询时间(0.093 秒)
Astronomers find a “cataclysmic” pair of stars with the shortest orbit yet（图）
“灾难性”恒星 恒星 双星系统
2023/6/9
Nearly half the stars in our galaxy are solitary like the sun. The other half comprises stars that circle other stars, in pairs and multiples, with orbits so tight that some stellar systems could fit ...
Astronomers discover a rare “black widow” binary, with the shortest orbit yet（图）
“黑寡妇”双星 恒星 伴星环 银河系
2023/6/9
The flashing of a nearby star has drawn MIT astronomers to a new and mysterious system 3,000 light years from Earth. The stellar oddity appears to be a new “black widow binary” — a rapidly spinning ne...
Driven by Earth's orbit, climate changes in Africa may have aided human migration（图）
Driven by Earth's orbit climate changes Africa may aided human migration
2020/2/20
In 1961, John Kutzbach, then a recent college graduate, was stationed in France as an aviation weather forecaster for the U.S. Air Force. There, he found himself exploring the storied caves of Dordogn...
Planet Formation in Earth-like Orbit around a Young Star
Planet Formation Earth Young Star
2016/4/13
The disks of dust and gas that surround young stars are the formation sites of planets. New images from the Atacama Large Millimeter/submillimeter Array (ALMA) reveal never-before-seen detai...
Orbit equivalence,flow equivalence and ordered cohomology
Orbit equivalence flow equivalence ordered cohomology
2015/9/29
We study self-homeomorphisms of zero dimensional metrizable compact Hausdorff spaces by means of the ordered first cohomology group, particularly in the light of the recent work of Giordano, Putnam, a...
Almost dense orbit on energy surface.
Index and Stability of Symmetric Periodic Orbits in Hamiltonian Systems with Application to Figure-Eight Orbit
Index and Stability of Symmetric Periodic Orbits Hamiltonian Systems Application to Figure-Eight Orbit
2015/4/3
Index and Stability of Symmetric Periodic Orbits in Hamiltonian Systems with Application to Figure-Eight Orbit.
Earth Orbit v2.1: a 3-D visualization and analysis model of Earth’s orbit, Milankovitch cycles and insolation
3-D visualization analysis model of Earth’s orbit
2014/12/18
Milankovitch theory postulates that periodic variability of Earth’s orbital elements is a major climate forcing
mechanism, causing, for example, the contemporary glaciainterglacial cycles.
Quaternionic vector coherent states for spin-orbit interactions
Quaternionic vector coherent states spin-orbit interactions Mathematical Physics
2012/4/23
This work addresses the study of two-dimensional electron gas in a perpendicular magnetic field in the presence of both Rashba and Dresselhaus spin-orbit (SO) interactions, with effective Zeeman coupl...
Noncommutative desingularization of orbit closures for some representations of $GL_n$
determinantal variety symmetric minor pfaffian partial flag variety exceptional collection derived equivalence quiver with relations
2012/4/18
We describe noncommutative desingularizations of determinantal varieties, determinantal varieties defined by minors of generic symmetric matrices, and pfaffian varieties defined by pfaffians of generi...
Starspots, spin-orbit misalignment, and active latitudes in the HAT-P-11 exoplanetary system
Starspots spin-orbit misalignment active latitudes
2011/10/9
We present the analysis of 4 months of Kepler photometry of the K4V star HAT-P-11, including 26 transits of its "super-Neptune" planet. The transit data exhibit numerous anomalies that we interpret as...
On using the beaming effect to measure spin-orbit alignment in stellar binaries with Sun-like components
measure spin-orbit alignment stellar binaries Sun-like components
2011/10/13
The beaming effect (aka Doppler boosting) induces a variation in the observed flux of a luminous object, following its observed radial velocity variation. We describe a photometric signal induced by t...
Extending the effective-one-body Hamiltonian of black-hole binaries to include next-to-next-to-leading spin-orbit couplings
Extending Hamiltonian black-hole binaries couplings
2011/10/17
In the effective-one-body (EOB) approach the dynamics of two compact objects of masses m1 and m2 and spins S1 and S2 is mapped into the dynamics of one test particle of mass mu = m1 m2/(m1+m2) and spi...
On smoothness of isometries between orbit spaces
Isometric groups action singular Riemannian foliations invariant function basic form
2011/9/5
Abstract: We discuss the connection between the smooth and metric structure on quotient spaces, prove smoothness of isometries in special cases and discuss an application to a conjecture of Molino.
Coulomb singularities in scattering wave functions of spin-orbit-coupled states
coulomb singularities spin-orbit-coupled states scattering wave functions
2011/10/8
Abstract: We report on our analysis of the Coulomb singularity problem in the frame of the coupled channel scattering theory including spin-orbit interaction. We assume that the coupling between the p...