Comparison of Velocity, Density, Temperature, and Mass Flux Results with Solar Coronal Models

Details Comparison of Velocity, Density, Temperature, and Mass Flux Results with Solar Coronal Models Comparison of Velocity, Density, Temperature, and Mass Flux Results with Solar Coronal Models

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh53c..07s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH53C-07

Astronomy and Astrophysics

Astrophysics

[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7549] Solar Physics, Astrophysics, And Astronomy / Ultraviolet Emissions, [7594] Solar Physics, Astrophysics, And Astronomy / Instruments And Techniques

Scientific paper

We have recently computed a series of global maps of plasma parameters in the extended corona using data from the Solar and Heliospheric Observatory (SOHO). The synoptic maps of velocity, density, temperature, and mass flux were derived from UV and white light coronal data obtained from the Ultraviolet Coronagraph Spectrometer (UVCS) and the Large Angle Spectroscopic Coronagraph (LASCO). The parameters are defined on a sphere at 2.3~ Rȯ from Sun-center and are organized by Carrington Rotations during the 1996 -- 1998 solar minimum for Solar Cycle 23. The data imply that there are large flux tube expansion factors near the coronal hole/streamer boundaries, but these factors change significantly as the corona evolves from minimum to the rising phase. We compare these data to an independently developed theoretical model that includes damping and acceleration by Alfven waves in the corona (see Cranmer et al. 2007, ApJS, 171, 520). The data set will be extended in the future and it will be used for constraining other theoretical models of the corona and solar wind.

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