搜索结果: 46-60 共查到“理学 magnetic fields”相关记录90条 . 查询时间(0.063 秒)
Observations of magnetic fields in hot stars
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/29
The presence of magnetic fields at the surfaces of many massive stars has been suspected for decades, to explain the observed properties and activity of OB stars.
Magnetic fields, winds and X-rays of the massive stars in the Orion Nebula Cluster
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/29
In some massive stars, magnetic fields are thought to confine the outflowing radiatively-driven wind. Although theoretical models and MHD simulations are able to illustrate the dynamics of such a magn...
The Hanle Effect as a Diagnostic of Magnetic Fields in Stellar Envelopes. V. Thin Lines from Keplerian Disks
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
This paper focuses on the polarized profiles of resonance scattering lines that form in magnetized disks. Optically thin lines from Keplerian planar disks are considered. Model line profiles are calcu...
Oscillations and instabilities in neutron stars with poloidal magnetic fields
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We study the time evolution of non-axisymmetric linear perturbations of a rotating magnetised neutron star, whose magnetic field is multipolar and purely poloidal. The background stellar configuration...
Concept of magnetic/current helicity was introduced to solar physics about 15 years ago. Earlier studies led to discovery of such fundamental properties as hemispheric helicity rule, and role of helic...
Since the structuring and variability of the Sun and other stars are governed by magnetic fields, much of present-day stellar physics centers around the measurement and understanding of the magnetic f...
Minimizers of the Lawrence-Doniach Functional with Oblique Magnetic Fields
Calculus of variations elliptic equations and systems superconductivity,
2010/12/1
We study minimizers of the Lawrence{Doniach energy, which describes equilibrium states of superconductors with layered structure, assuming Floquet-periodic boundary conditions.
Magnetometry of random AC magnetic fields using a single Nitrogen-Vacancy center
Magnetometry random AC magnetic fields single Nitrogen-Vacancy center
2010/10/21
We report on the use of a single NV center to probe fluctuating AC magnetic fields. Using engineered currents to induce random changes in the field amplitude and phase, we show that stochastic fluctua...
Quantum Equivalent Magnetic Fields that Are Not Classically Equivalent
Quantum Equivalent Magnetic Fields Not Classically Equivalent
2010/11/29
We construct pairs of compact K¨ahler-Einstein manifolds (Mi, gi, !i) (i = 1, 2)of complex dimension n with the following properties.
Application of polarization ellipse technique for analysis of ULF magnetic fields from two distant stations in Koyna-Warna seismoactive region, West India
Application polarization ellipse technique analysis ULF
2010/10/21
A new approach is developed to find the source azimuth of the ultra low frequency (ULF) electromagnetic (EM) signals believed to be emanating from well defined seismic zone. The method is test applied...
Explained: Dynamo theory--Recent discoveries raise questions about how small planets can have self-sustaining magnetic fields（图）
Dynamo theory small planets self-sustaining magnetic fields
2010/4/21
The Earth’s global magnetic field is generated in its metallic core, located nearly 3,000 kilometers beneath the planet’s surface. The field has existed on Earth for at least 3.5 billion years and off...
Radiation from sub-Larmor scale magnetic fields
radiation mechanisms laboratory astrophysics high-energy-density physics gammaray bursts shock waves reconnection
2010/3/9
Spontaneous rapid growth of strong magnetic fields is rather ubiquitous in high-energy density environments ranging from astrophysical sources (e.g., gamma-ray bursts and relativistic shocks), to reco...
Magnetic Doppler imaging of alpha^2 Canum Venaticorum in all four Stokes parameters--Unveiling the hidden complexity of stellar magnetic fields
polarization stars atmospheres stars chemically peculiar stars magnetic fields stars individual: 2 CVn
2010/3/8
Strong organized magnetic fields have been studied in the upper main sequence chemically peculiar stars for more than half a century. However, only recently have observational methods and numerical te...
Billiards in magnetic fields: A molecular dynamics approach
magnetic fields molecular dynamics approach
2010/4/7
We present a computational scheme based on classical molecular dynamics to study chaotic billiards in static external magnetic fields. The method allows to treat arbitrary geometries and several inter...
Computing nonlinear force free coronal magnetic fields
nonlinear force free coronal magnetic fields
2009/11/12
Knowledge of the structure of the coronal magnetic field is important for our understanding of many solar activity phenomena, e.g. flares and CMEs. However, the direct measurement of coronal magnetic ...