Explosive events in the solar transition zone

Details Explosive events in the solar transition zone Explosive events in the solar transition zone

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..123...41d&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 123, no. 1, 1989, p. 41-68.

Computer Science

Sound

156

Helioseismology, Solar Activity, Solar Atmosphere, Solar Spectra, Carbon, Magnetohydrodynamic Turbulence, Raster Scanning, Rocket Sounding, Solar Wind, Ultraviolet Radiation

Scientific paper

The properties of explosive events in the solar transition zone are presented with detailed examples and statistical analyses. These events are observed as regions of exceptionally high velocity in profiles of C IV, formed at 100,000 K, observed with the High Resolution Telescope and Spectrograph. The following average properties are determined from the observations: FWHM extent along the slit of 1600 km, maximum velocity of 110 km/s, peak emission measure of 4 x 10 to the 41st/cu cm, lifetime of 60 s, birthrate of 4 x 10 to the -21st/sq cm/s in a coronal hole and 10 to the -20th/sq cm/s in the quiet sun, mass of 6 x 10 to the 8th g, and kinetic energy of 6 x 10 to the 22nd erg. The examples show that there are considerable variations from the average parameters in individual events. The events show considerable spatial structure and are not pointlike objects.

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