搜索结果: 1-15 共查到“天体物理学 Dynamics”相关记录23条 . 查询时间(0.093 秒)
Fe IX Calculations for the Solar Dynamics Observatory
Fe IX Calculations Solar Dynamics Observatory
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2011/9/27
New calculations of the energy levels, radiative transition rates and collisional excitation rates of \ion{Fe}{ix} have been carried out using the Flexible Atomic Code, paying close attention to exper...
We study the motion of spinning test bodies in the de Sitter spacetime of constant positive curvature. With the help of the 10 Killing vectors, we derive the 4-momentum and the tensor of spin explici...
A comprehensive understanding of the solar magnetic cycle requires detailed modeling of the solar interior including the maintenance and variation of large scale flows (differential rotation and merid...
Large-Scale Gas Dynamics in the Adhesion Model: Implications for the Two-Phase Massive Galaxy Formation Scenario
the Adhesion Model Implications the Two-Phase Massive Galaxy Formation Scenario
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2011/1/13
The mass assembly and star formation histories of massive galaxies identified at low redshift z in different cosmological hydrodynamical simulations, have been studied through a detailed follow-up ba...
We examine Milky Way-Magellanic Cloud systems selected from the Millennium-II Simulation in order to place the orbits of the Magellanic Clouds in a cosmological context. Our analysis shows that satell...
Origin and Dynamics of the Mutually Inclined Orbits of Upsilon Andromedae c and d
Origin Dynamics Mutually Inclined Orbits
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2010/11/12
We evaluate the orbital evolution and several plausible origins scenarios for the mutually inclined orbits of υ And c and d. These two planets have orbital ele-ments that oscillate with large amplitud...
The dust formed in extended circumstellar envelopes of long-period variables and Miras has a strong influence on the envelope dynamics. A radiatively driven instability caused by the formation of dust...
Constraints on the Assembly and Dynamics of Galaxies: I. Detailed Rest-frame Optical Morphologies on Kiloparsec-scale of z ~ 2 Star-forming Galaxies
galaxies evolution galaxies high-redshift galaxies kinematics and dynamics
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2010/11/11
We present deep and high-resolution Hubble Space Telescope NIC2 F160W imaging at 1.6 μm of six z 2 star-forming galaxies with existing near-infrared integral field spectroscopy from SINFONI at the V...
Dynamics of Protoplanetary Disks
protoplanetary disks accretion pre-main-sequence stars
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2010/11/11
Protoplanetary disks are quasi-steady structures whose evolution and dispersal determine the environ-ment for planet formation. I review the theory of protoplanetary disk evolution and its connection ...
The multi-stream flows and the dynamics of the cosmic web
cosmic web cosmological simulations cosmic flows
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2010/11/12
A new numerical technique to identify the cosmic web is proposed. It is based on locating multi-stream flows, i.e. the places where the velocity field is multi-valued. The method is local in Eulerian ...
Investigation of Dynamics of Self-Similarly Evolving Magnetic Clouds
Solar and Stellar Astrophysics (astro-ph.SR)
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2011/1/7
Magnetic clouds (MCs) are "magnetized plasma clouds" moving in the solar wind. MCs transport magnetic flux and helicity away from the Sun. These structures are not stationary but feature temporal evol...
On the dynamics of tidal streams in the Milky Way galaxy
Galaxy Astrophysics (astro-ph.GA)
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2011/1/6
We present a brief history of Galactic astrophysics, and explain the origin of halo substructure in the Galaxy. We motivate our study of tidal streams by highlighting the tight constraints that analys...
Induced Gravity and the Attractor Dynamics of Dark Energy/Dark Matter
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
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2010/12/29
Attractor solutions that give dynamical reasons for dark energy to act like the cosmological constant, or behavior close to it, are interesting possibilities to explain cosmic acceleration.
The angular momentum evolution of stars close to massive black holes (MBHs) is driven by secular torques. In contrast to two-body relaxation, where interactions between stars are incoherent, the resul...
External field effect of modified Newtonian dynamics in the Solar system
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
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2010/12/27
The Modified Newtonian Dynamics (MOND) has been formulated as a modification of the Poisson equation for the Newtonian gravitational field.