Plasma flows due to time dependent heating of the solar corona

R. W. Walsh*, G. E. Bell, A. W. Hood

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The heating mechanism of the Sun's corona is of central importance in Solar Physics research. In this paper it is assumed that the heat is deposited in a regular time dependent manner and the temperature, density and pressure variations as well as the plasma flows created, are investigated. It is assumed that the magnetic field is strong, so that the dynamics reduce to a one dimensional problem along the field. In addition, if the radiative time in the corona is much longer than the sound travel time then the plasma evolves isobarically. The variations of the frequency of the time-dependent heating supply are investigated and a critical value is found above which a hot corona can be maintained and below which the plasma temperature cools to chromospheric values. The implications of time-dependent heating upon the forthcoming SOHO observations are also discussed.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalAstrophysical Letters and Communications
Issue number1-6
Publication statusPublished - 1 Dec 1996


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