عنوان

The Solar Spectrum

9789401035873

9789401035897

b408696

The Solar Spectrum

[Book]

Proceedings of the Symposium held at the University of Utrecht 26-31 August 1963 /

edited by C. Jager.

Dordrecht :

Springer Netherlands,

1965.

Astrophysics and Space Science Library,

1

0067-0057 ;

Opening Address -- Fourty Years of Solar Spectroscopy -- Session I The Photosphere -- La Structure de la Photosphère -- The Current Revision of the Solar Spectrum Table ? 2935 Å to ? 8770 Å -- Discussion on Line Formation and Photospheric Structure -- Discussion on New Instrumental Techniques -- Discussion on Photospheric Motions -- Session II The Quiet Chromosphere -- The Theory of the Chromospheric Spectrum -- The Chromospheric Spectrum at Eclipse -- Rocket Spectra of the Chromosphere -- Discussion on the Quiet Chromosphere -- Session III The Active Photosphere and Chromosphere Spots, Plages, Flares and Prominences -- Spectra of Solar Activity Regions -- About the Flare Problem -- Discussion on the Active Chromosphere -- Session IV The Corona -- The Theory of the Coronal Spectrum -- The Coronal Spectrum -- Discussion on tne Corona -- Session V Particle and Radio Emission From The Sun -- Particle and Radio Emission from the Sun -- The Variable Solar Radio Spectrum -- Non-Thermal Sources and Amplified Emission in Solar Radio Bursts -- Some Aspects of the Type-IV Continuum Radiation on Decimeter Wavelengths -- Discussion on Radio and Particle Emission from the Sun.

0

A good deal of our information on solar physics and on solar phenomena is derived from the solar spectrum. A quantitative interpretation of this spectrum was only possible after 1920, after the establishment of Bohr's atomic model, the discovery of Saha's law, and the development of spectrophotometry. The resolving and light gathering powers of our instruments have greatly increased since. We have seen an enormous progress in our theoretical under standing of basic atomic phenomena, and of the intricate problems concerned with the transfer of energy through a complicated structure like the sun's outer layers. In particular the observable part of the solar spectrum tremen dously enlarged since the introduction, in the years after 1945, of radio astronomy, enabling us to study the solar spectrum between wavelengths of some mm to about 15 m, of space research, giving access to the whole electro magnetic spectrum below 3000 A, down to about 0. 01 A. Further, the low and high energetic components of the solar particles spectrum have been dis covered with space probes (the solar wind), rockets, balloons (the so-called sub cosmic-ray particles) and cosmic ray monitors (solar cosmic ray bursts). The extreme wealth of this spectrum, much vaster in extent than the earlier investigators could only dream of, is an important source of information. It looked appropriate to us, after the rapid development of this branch of science,' to invite the world's leading solar physicists to Utrecht for a summa rizing symposium on the whole solar spectrum.

9789401035897

Springer eBooks

Proceedings of the Symposium held at the University of Utrecht, 26-31 August 1963

Physics.

Jager, C.

SpringerLink (Online service)

20190307162200.0

[Book]

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