搜索结果: 16-30 共查到“天文学 Sun”相关记录50条 . 查询时间(0.078 秒)
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology
convection — Sun helioseismology
2010/11/10
We report on a new phenomenon of ‘alignment’ of supergranulation cells in the polar regions of the Sun. Recent high-resolution datasets obtained by the Solar Optical Telescope (SOT) onboard the Hinode...
Persistent Magnetic Wreaths in a Rapidly Rotating Sun
convection – MHD – stars:interiors – stars rotation – stars magnetic fields – Sun:interior
2010/11/15
When our Sun was young it rotated much more rapidly than now. Observations of young, rapidly rotating stars indicate that many possess substantial magnetic activity and strong axisymmetric magnetic fi...
Impact of MHD Turbulence on Thermal Wind Balance in the Sun
instabilities—rotation—sun magnetohydrodynamics— stars sun
2010/11/15
The possible role of magneto-rotational instability (MRI) and its driven MHD turbulence in
the solar interior is studied on the basis of the linear and nonlinear theories coupling with
physical para...
Is it possible to reveal the lost siblings of the Sun?
Galaxy solar neighborhood - stars kinematics and dynamics - Galaxy structure
2010/11/12
We present the results of our numerical experiments on stellar scattering in the galactic
disc under the influence of the perturbed galactic gravitation field connected with the spiral
density waves...
A precise asteroseismic age and radius for the evolved Sun-like star KIC 11026764
precise asteroseismic age evolved Sun-like star KIC 11026764
2011/1/10
The primary science goal of the Kepler Mission is to provide a census of exoplanets in the solar neighborhood, including the identification and characterization of habitable Earth-like planets. The as...
Variations in the axisymmetric transport of magnetic elements on the Sun: 1996-2010
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
We measure the axisymmetric transport of magnetic flux on the Sun by cross-correlating narrow strips of data from line-of-sight magnetograms obtained at a 96-minute cadence by the MDI instrument on th...
A Census of White Dwarfs Within 40 Parsecs of the Sun
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
Our aim is to compile a catalog of white dwarfs within 40 parsecs of the Sun, in which newly discovered objects would significantly increase the completeness of the current census. White dwarf candida...
The State of Self-Organized Criticality of the Sun During the Last Three Solar Cycles. II. Theoretical Model
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
The observed powerlaw distributions of solar flare parameters can be interpreted in terms of a nonlinear dissipative system in the state of self-organized criticality (SOC).
Physics of the Sun’s Hot Atmosphere
Solar atmosphere X-ray EUV emission coronal heating solar wind
2010/9/16
This article briefly overviews the physics of the Sun’s hot atmosphere,using observations from recent solar spacecrafts: Yohkoh, SOHO,TRACE and RHESSI.
Why Study the Sun?
Sun—flares—prominences—coronal mass ejection—coronal holes—helioseismology
2010/9/16
In this presentation we briefly describe the Sun through large number of illustrations and pictures of the Sun taken from early times to the present day space missions. The importance of the study of ...
Physicists have so far failed to find direct evidence for the existence of dark matter – the non-luminous substance believed to make up some 23% of the mass-energy content of the universe – at least t...
'Self-repairing' photovoltaics not damaged by the Sun（图）
'Self-repairing' photovoltaics the Sun
2010/9/21
Researchers at the Massachusetts Institute of Technology have fabricated the first synthetic photovoltaic cell capable of repairing itself. The cell mimics the self-repair system naturally found in pl...
The Sun's magnetic field warps its environment（图）
The Sun's magnetic field environment astronauts
2010/9/21
The Sun's extended magnetic field provides a vital shield for astronauts; without it they would be left exposed to potentially deadly cosmic rays entering in from outside the solar system. Now, a grou...
On the Modelling of Rotational Effects in the Lower Convective Region of the Sun
Hydrodynamics-Sun general-Sun interior-Sun rotation-Sun fundamental parameters
2010/6/30
The purpose of this work is to study effects of differential rotation in the lower convective region of the Sun. Similar to MHD case; the governing equations are separated in variables, allowing numer...
The first high-resolution images of the Sun have been returned from NASA's Solar Dynamics Observatory (SDO), which was launched in February. The $850m mission will investigate the causes of solar vari...