منابع مشابه
Dynamics of the solar granulation
Excellent spectrograms can yield observational insight in the dynamics of the solar surface not yet accessible to numerical simulations. We present results of the elaboration of a series of spectrograms taken at the center of the solar disk. Each of the spectrograms includes more than 250 granules, while the series covers a time of 12 min. Our main emphasis is to study the dynamics of the visib...
متن کاملVector magnetic fields of Solar Granulation
Observations of quiet Sun from the Solar Optical Telescope/SpectroPolarimeter (SOT/SP) aboard the Hinode spacecraft would reveal the magnetic characters of the solar photosphere. By making use of the deep mode observations of three quiet regions, we have statistically studied the vector magnetic fields of solar granulation. More than 2000 normal granules are manually selected to form a sample. ...
متن کاملLine formation in solar granulation III .
Using realistic hydrodynamical simulations of the solar surface convection as 3D, time-dependent, inhomoge-neous model atmospheres, the solar photospheric Si abundance has been determined to be log ǫ Si = 7.51 ± 0.04. This constitutes a difference of 0.04 dex compared with previous estimates based on the 1D Holweger-Müller (1974) model, of which half is attributable to the adopted model atmosph...
متن کاملGranulation and magnetism in the solar atmosphere
The properties of the photosphere in magnetic and nonmagnetic regions, at two levels in the solar atmosphere, have been studied, using two virtually simultaneous time sequences of 109 mn duration of CCD images taken at the Vacuum Tower Telescope of the Sacramento Peak Observatory. The selected wavelengths correspond to the true continuum and to the wing of the MgIb1 line, where brightenings are...
متن کاملHeight variation of the solar granulation
We analyze spectral scans of narrow-band images across the Na D2 line. They were obtained from disc centre of the Sun with our Fabry-Perot interferometer (FPI) in the Vacuum Tower Telescope at the Observatorio del Teide. The FPI was set to a bandwidth of 200 mÅ FWHM and the spectral stepwidth was 100 mÅ. Our aim is to study the variation of the granulation pattern with height in the atmosphere....
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1936
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/96.5.402