Intermittent heating of the corona as an alternative to generate fast solar wind flows

Details Intermittent heating of the corona as an alternative to generate fast solar wind flows Intermittent heating of the corona as an alternative to generate fast solar wind flows

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..329g&link_type=abstract

The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 329-332 (1999).

Physics

Particle Emission, Solar Wind

Scientific paper

We discuss a new alternative to the generation of fast streams which does not require momentum addition beyond the critical point. We consider the consequences on the solar wind of temporally intermittent heat depositions at the base of the wind. With the help of 1d hydrodynamic simulations we show that the instantaneous wind velocity profile fluctuates around an average profile well above the one corresponding to the Parker solution with a coronal temperature equal to the average coronal temperature imposed at the bottom of the numerical domain. The origin of this result lies in a previously overlooked phenomenon, the overexpansion of hot plasma regions in the subsonic wind.

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