The sources of material comprising a mass ejection coronal transient

Details The sources of material comprising a mass ejection coronal transient The sources of material comprising a mass ejection coronal transient

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...45..363h&link_type=abstract

Solar Physics, vol. 45, Dec. 1975, p. 363-376.

Astronomy and Astrophysics

Astronomy

29

Coronagraphs, Solar Corona, Solar Prominences, Stellar Mass Ejection, H Lines, Helium, Skylab Program, Spaceborne Astronomy, Spectroheliographs

Scientific paper

The origin of the material ejected during a white-light coronal transient on August 26 and 27, 1973, is investigated using simultaneous observations of a slowly ascending prominence and the more rapid accompanying coronal transient. Nearly identical simultaneous images of the prominence were obtained over a six-hour period in the H-alpha and He II (304 A) emission lines; contemporaneous Skylab coronograph observations over approximately 1.5 hours showed that the mass-ejection coronal transient rose above the ascending prominence. Based on analysis of these observations, it is concluded that: (1) the bulk of the ejected material originated in the lower corona, despite the lack of an observed depletion there; (2) the material in the transient was at coronal temperature and was visible in polarized radiation due to Thomson scattering of photospheric light by free electrons; and (3) the total event was far larger, more energetic, and longer lasting than would have been inferred from the prominence observations alone.

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