搜索结果: 1-15 共查到“天体物理学 Magnetic-Field”相关记录29条 . 查询时间(0.14 秒)
When we look out into space, all of the astrophysical objects that we see are embedded in magnetic fields. This is true not only in the neighborhood of stars and planets, but also in the deep space be...
Magnetic-Field Discovery Gives Clues to Galaxy-Formation Processes（图）
Magnetic-Field Gives Clues Galaxy-Formation
2015/7/13
Astronomers making a detailed, multi-telescope study of a nearby galaxy have discovered a magnetic field coiled around the galaxy's main spiral arm. The discovery, they said, helps explain how galacti...
Large-scale magnetic field generation via the Kelvin-Helmholtz instability
Large-scale magnetic field generation Kelvin-Helmholtz instability
2011/10/18
We present the first self-consistent three-dimensional particle-in-cell simulations of the Kelvin-Helmholtz instability (KHI) in an unmagnetized scenario. We discuss the main features, including densi...
We present new spectropolarimetric observations of the normal A-type star Vega, obtained during the summer of 2010 with NARVAL at T\'elescope Bernard Lyot (Pic du Midi Observatory). This new time-seri...
Faraday Rotation Measure due to the Intergalactic Magnetic Field II: the Cosmological Contribution
intergalactic medium — large-scale structure of universe —magnetic fields — polarization
2011/8/24
We investigate the Faraday rotation measure (RM) due to the intergalactic magnetic field (IGMF) through the cosmic web up to cosmological distances, using a model IGMF based on turbulence dynamo in th...
Comparison of Energies Between Eruptive Phenomena and Magnetic Field in AR 10930
Energies Eruptive Phenomena Magnetic Field
2011/1/11
We present a study comparing the energy carried away by a coronal mass ejection (CME) and the radiative energy loss in associated flare plasma, with the decrease in magnetic free energy during a relea...
A decay of the ultra-high-energy neutrino $\nu_e \to e^- W^+$ in a magnetic field and its influence on the shape of the neutrino spectrum
the ultra-high-energy neutrino the neutrino spectrum
2011/1/13
The width of the neutrino decay into the electron and $W$ boson in a strong external magnetic field is obtained from the imaginary part of the neutrino self-energy. This result corrects the formulae ...
Modeling of the subgrid-scale term of the filtered magnetic field transport equation
the subgrid-scale term the filtered magnetic field
2011/1/11
Accurate subgrid-scale turbulence models are needed to perform realistic numerical magnetohydrodynamic (MHD) simulations of the subsurface flows of the Sun. To perform large-eddy simulations (LES) of ...
Context: In addition to the `facular' brightening of active regions, the quiet Sun also contains a small scale magnetic field with associated brightenings in continuum radiation. Aims: To measure the ...
The extraordinary complex magnetic field of the helium-strong star HD 37776
The extraordinary complex magnetic field the helium-strong star HD 37776
2011/1/11
The early-type chemically peculiar stars often show strong magnetic fields on their surfaces. These magnetic topologies are organized on large scales and are believed to be close to an oblique dipole ...
A comparison of preprocessing methods for solar force-free magnetic field extrapolation
preprocessing methods solar force-free magnetic field extrapolation
2011/1/13
Extrapolations of solar photospheric vector magnetograms into three-dimensional magnetic fields in the chromosphere and corona are usually done under the assumption that the fields are force-free. The...
Homologous Flares and Magnetic Field Topology in Active Region NOAA 10501 on 20 November 2003
Active Regions Magnetic Fields Flares Dynamics Flares Relation
2010/11/11
We present and interpret observations of two morphologically homologous flares that occurred in active region (AR) NOAA 10501 on 20 November 2003. Both flares displayed four homologous H ribbons and ...
The magnetic field in the NGC 2024 FIR 5 dense core
individual ISM magnetic fields Polarization Stars formation Techniques interferometric
2010/11/10
We used the Submillimeter Array (SMA) to observe the thermal polarized dust emission from the protostellar source NGC 2024 FIR 5. The polarized emission outlines a partial hourglass morphology for the...
Effects of non-uniform interstellar magnetic field on synchrotron X-ray and inverse-Compton gamma-ray morphology of SNRs
Magnetohydrodynamics (MHD) Radiation mechanisms non-thermal Shock waves ISM
2010/11/12
Context. Observations of SNRs in X-ray and γ-ray bands promise to contribute with important information in our understanding of the kinematics of charged particles and magnetic fields in the vicinity ...
Anomalous X-ray pulsars and soft gamma repeaters have recently emerged as a unified class of neutron stars, identified by dramatic X-ray and gamma-ray outbursts and via luminous X-ray pulsations, both...