61. Sunspots: radio, optical and geomagnetic features
نویسندگان
چکیده
منابع مشابه
New radio instrumentation for the study of sunspots and starspots
Much of the radio emission from the Sun and similar stars depends directly on magnetic fields for its source. For this reason, radio emission contains important diagnostic information on solar and stellar magnetic fields. This paper reviews the ways in which radio emission is sensitive to magnetic fields and discusses new radio instrumentation that will be able to exploit this information for m...
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The relation between the Evershed flow and moving magnetic features (MMFs) is studied using highcadence, simultaneous spectropolarimetric measurements of a sunspot in visible (630.2 nm) and near-infrared (1565 nm) lines. Doppler velocities, magnetograms, and total linear polarization maps are calculated from the observed Stokes profiles. We follow the temporal evolution of two Evershed clouds t...
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Power spectrum analyses of temperature series at New York City (1822-1956), the Netherlands (1735-1944), and central England (1698-1955) show that the only significant energy in these spectrums appears at the annual period of 12 months. No significant energy was found corresponding to any known sunspot periodicity. Correlation coefficients between January and July temperatures for the years of ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1957
ISSN: 0074-1809
DOI: 10.1017/s0074180900049366