4.1.2.7 Flares

Wilhelm, K.

doi:10.1007/978-3-540-88055-4_12

Cited by 1 publication

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References 140 publications

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“…The solar electromagnetic radiation extends over 14 decades from the γ-ray range to radio waves 9 ; for an overview see Wilhelm (2009) and the references therein. The extreme ranges do not significantly contribute to the quietSun energy output, which is concentrated between the X-ray range and the infrared from λ ≈ 12.3 pm (hν = 100 keV) to λ ≈ 1 mm (hν = 1.2 meV).…”

Section: The Solar Electromagnetic Spectrummentioning

confidence: 99%

Quantitative solar spectroscopy

Wilhelm¹

2010

Astron Nachr

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Quantitative solar spectroscopy must be based on calibrated instrumentation. The basic requirement of a calibration, i.e., a comparison between the instrument under test and a primary laboratory standard through appropriate procedures, will be briefly reviewed, and the application to modern space instruments will be illustrated. Quantitative measurements of spectral radiances with high spectral and spatial resolutions as well as spectral irradiances yield detailed information on temperatures, electron densities, bulk and turbulent motions, element abundances of plasma structures in various regions of the solar atmosphere -from the photosphere to the outer corona and the solar wind. The particular requirements for helioseismology and magnetic-field observations will not be covered in any depth in this review. Calibration by a laboratory standard is necessary, but not sufficient, because an adequate radiometric stability can only be achieved together with a stringent cleanliness concept that rules out a contamination of the optical system and the detectors as much as possible. In addition, there is a need for calibration monitoring through inter-calibration and other means.

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Section: The Solar Electromagnetic Spectrummentioning

confidence: 99%

Quantitative solar spectroscopy

Wilhelm¹

2010

Astron Nachr

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4.1.2.7 Flares

Cited by 1 publication

References 140 publications

Quantitative solar spectroscopy

Quantitative solar spectroscopy

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