Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...63t&link_type=abstract
NASA Goddard Space Flight Center, International Solar Wind 8 Conference, p. 63
Astronomy and Astrophysics
Astronomy
Coronal Holes, Solar Wind, Plasma Heating, Magnetohydrodynamic Waves, Solar Corona, Solar Wind Velocity, Digital Simulation, Flow Velocity, X Ray Telescopes, Japanese Spacecraft, Spaceborne Astronomy, Mathematical Models, Solar Flux Density, Solar Temperature
Scientific paper
Recent observations of coronal holes made with the soft X-ray telescope aboard Yohkoh have indicated a temperature of 1.8 approximately 2.1 x 106 K and an emission measure of 1025.7 approximately 26.2 cm -5. This is almost the same as in quiet regions of the Sun. Numerical simulations of the temperature density and velocity structure in a coronal hole. using a parameterized heating distribution have been used for a comparison with the Yohkoh observations. Models are obtained which fit the observed temperature and emission measure. with heating fluxes which are consistent with other measurements. However, the final velocity of the solar wind is very slow which indicates the necessity of another acceleration mechanism such as alfven waves.
Hearn A. G.
Tziotziou Kostas
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