Time-Dependent Heating of the Solar Corona

Details Time-Dependent Heating of the Solar Corona Time-Dependent Heating of the Solar Corona

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..161...83w&link_type=abstract

Solar Physics, Volume 161, Issue 1, pp.83-102

Physics

20

Scientific paper

The problem of how the corona is heated is of central importance in solar physics research. Here it is assumed that the heating occurs in a regular time-dependent manner and the response of the plasma is investigated. If the magnetic field is strong then the dynamics reduces 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 evolvesisobarically. The frequency with which heat is deposited in the corona is investigated and it is shown that there is a critical frequency above which a hot corona can be maintained and below which the plasma temperature cools to chromospheric values. An evaluation of the isobaric assumption to the solar corona and the implications of time-dependent heating upon the forthcoming SOHO observations are also presented.

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