搜索结果: 1-15 共查到“天文学 fundamental”相关记录19条 . 查询时间(0.125 秒)
The bar-halo interaction - I. From fundamental dynamics to revised N-body requirements
dark matter formation
2014/12/23
A galaxy remains near equilibrium for most of its history. Only through resonances can non-axisymmetric features, such as spiral arms and bars, exert torques over large scales and change the overall s...
Globular Cluster Evolution in M87 and Fundamental Plane Ellipticals
M87 Fundamental Plane Ellipticals
2014/12/23
The globular cluster population in M87 has decreased measurably through dynamical evolution caused by relaxation, binary heating and time-dependent tidal perturbation. For fundamental plane elliptical...
Fundamental Physics and Relativistic Laboratory Astrophysics with Extreme Power Lasers
Fundamental Physics Relativistic Laboratory Astrophysics Extreme Power Lasers
2012/2/23
The prospects of using extreme relativistic laser-matter interactions for laboratory astrophysics are discussed. Laser-driven process simulation of matter dynamics at ultra-high energy density is prop...
Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
Four Fundamental Foreground Power Spectrum Shapes Cosmology Observations
2012/2/24
Contamination from instrumental effects interacting with bright astrophysical sources is the primary impediment to measuring Epoch of Reionization and BAO 21 cm power spectra-an effect called mode-mix...
Gyromagnetic Factors and Atomic Clock Constraints on the Variation of Fundamental Constants
Gyromagnetic Factors Atomic Clock Constraints Variation Fundamental Constants
2011/10/14
We consider the effect of the coupled variations of fundamental constants on the nucleon magnetic moment. The nucleon g-factor enters into the interpretation of the measurements of variations in the f...
The 55 Cancri System: Fundamental Stellar Parameters, Habitable Zone Planet, and Super-Earth Diameter
Cancri System: Fundamental Stellar Parameters Super-Earth Diameter
2011/9/30
The bright star 55 Cancri is known to host five planets, including a transiting super-Earth. We use the CHARA Array to directly determine the following of 55 Cnc's stellar astrophysical parameters: $R...
The Jeans Mass as a Fundamental Measure of Self-Gravitating Disc Fragmentation and Initial Fragment Mass
stars: formation accretion accretion discs methods:analytical
2011/9/28
As a formation route for objects such as giant planets and low-mass stars in protostellar discs (as well as stars in AGN discs), theories of self-gravitating disc fragmentation need to be able to pred...
Observing the Big Bounce with Tensor Modes in the Cosmic Microwave Background: Phenomenology and Fundamental LQC Parameters
Quantum gravity quantum cosmology
2010/11/12
Cosmological models where the standard Big Bang is replaced by a bounce have been studied for
decades. The situation has however dramatically changed in the last years for two reasons. First,because ...
In this article we give a brief review of the fundamental physics that can be done with the future space-based gravitational wave detector LISA. This includes detection of gravitational wave bursts co...
Fundamental Properties of the Highly Ionized Plasmas in the Milky Way
Galaxy disk — ISM Clouds — ISM structure — ultraviolet ISM
2010/11/15
The cooling transition temperature gas in the interstellar medium (ISM), traced by the high ions,Si IV, C IV, N V and O VI, helps to constrain the flow of energy from the hot ISM with T > 106 K to the...
We consider the signatures of a domain wall produced in the spontaneous symmetry breaking
involving a dilaton-like scalar field coupled to electromagnetism. Domains on either side of the wall exhibit...
The fundamental parameters of the roAp star $\gamma$ Equulei
Methods observational - Techniques high angular resolution - Techniques interferometric - Stars
2010/11/12
Context. Physical processes working in the stellar interiors as well as the evolution of stars depend on some fundamental stellar properties, such as mass, radius, luminosity, and chemical abundances.
Asteroseismology of red giants from the first four months of Kepler data: Fundamental parameters
red giants from Kepler data Fundamental parameters
2011/1/10
Clear power excess in a frequency range typical for solar-type oscillations in red giants has been detected in more than 1000 stars, which have been observed during the first 138 days of the science o...
I present an argument, based on the topology of the universe, why there are three generations of fermions. The argument implies a preferred gauge group of SU(5), but with SO(10) representations of the...
Why gravity is fundamental
gravity fundamental
2010/3/19
It is argued that the existence of a minimum size of spacetime may imply the fundamental existence of gravity as a geometric property of spacetime described by general relativity.