Magneto-acoustic Waves And Their Role In The Energetics And Dynamics Of The Solar Chromosphere

Details Magneto-acoustic Waves And Their Role In The Energetics And Dynamics Of The Solar Chromosphere Magneto-acoustic Waves And Their Role In The Energetics And Dynamics Of The Solar Chromosphere

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21012004j&link_type=abstract

American Astronomical Society Meeting 210, #120.04; Bulletin of the American Astronomical Society, Vol. 39, p.245

Computer Science

Sound

1

Scientific paper

We analyze a diverse set of observations obtained with SOHO and TRACE, as well as with MOTH and the Swedish 1 m Solar Telescope to show that sound waves play an important role in shaping the structure and energetics of the magnetized chromosphere. Travel time analysis of TRACE, MOTH and SST observations and comparisons with numerical simulations show that normally evanescent 5 minute p-mode oscillations leak into the chromosphere along flux tubes that are inclined with the vertical. Comparisons of SST data of fibril-like jets above active region plage and quiet Sun mottles with advanced radiative MHD simulations show how these oscillations develop into slow mode magnetoacoustic shocks that drive spicule-like chromospheric jets up to coronal heights.
The leaking waves not only drive much of the dynamics of the magnetized chromosphere: Doppler measurements from the MOTH instrument at several heights in the atmosphere show that the total energy flux carried by these leaking waves may play a significant role in the energy balance of the magnetized chromosphere.
We describe first approaches to determine more precisely how and where the wave energy is deposited in the low atmosphere.

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