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Astron. Astrophys. 340, 556-568 (1998)


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Acoustic wave propagation in the solar atmosphere

III. Analytic solutions for adiabatic wave excitations

G. Sutmann 1, Z.E. Musielak 2, 1 and P. Ulmschneider 1

1 Institut für Theoretische Astrophysik der Universität Heidelberg, Tiergartenstrasse 15, D-69121 Heidelberg, Germany
2 Center for Space Plasma, Aeronomy and Astrophysics Research, University of Alabama, Huntsville, AL 35899, USA

Received 13 November 1997 / Accepted 23 July 1998

Abstract

The response of an isothermal solar type atmosphere to adiabatic excitations by various small amplitude acoustic disturbances is studied analytically. Both continuous and pulse excitations are discussed. It is shown that wavetrains of random pulses may be responsible for the excitation of the 3-min solar oscillations.

Key words: Sun: photosphere – Sun: oscillations – Sun: chromosphere – acoustic wave – shock waves – hydrodynamics

Send offprint requests to: P. Ulmschneider
Correspondence to: ulmschneider@ita.uni-heidelberg.de

© European Southern Observatory (ESO) 1998

Online publication: November 9, 1998

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