Abstract
A new branch of solar research has been developed since 1975, when it was discovered that the photospheric periodic motions previously known as “5-minute oscillations” have a spectrum of discrete frequencies. A large number of such “modes”, with periods between, roughly, 3 and 12 minutes have been observed. They are identified as acoustic waves, or p modes, where the pressure gradient is the main restoring force. The discrete mode pattern is a consequence of reflecting boundaries and can be used to obtain Information about the Sun’s interior.
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© 1989 Springer-Verlag Berlin Heidelberg
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Stix, M. (1989). Oscillations. In: The Sun. Astronomy and Astrophysics Library. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-97129-7_5
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DOI: https://doi.org/10.1007/978-3-642-97129-7_5
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-53796-0
Online ISBN: 978-3-642-97129-7
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