X-ray bright points and He I lambda 10830 dark points

Details X-ray bright points and He I lambda 10830 dark points X-ray bright points and He I lambda 10830 dark points

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sxsr.rept.....g&link_type=abstract

In American Science and Engineering, Inc., Solar X-ray Astronomy Sounding Rocket Program 8 p (SEE N90-10796 01-88)

Astronomy and Astrophysics

Astronomy

Emission Spectra, Helium, Line Spectra, Solar Spectra, X Ray Astronomy, X Ray Sources, Image Analysis, Radiation Absorption, Solar Physics, Spectroheliographs, X Ray Imagery

Scientific paper

Using near-simultaneous full disk Solar X-ray images and He I 10830 lambda, spectroheliograms from three recent rocket flights, dark points identified on the He I maps were compared with X-ray bright points identified on the X-ray images. It was found that for the largest and most obvious features there is a strong correlation: most He I dark points correspond to X-ray bright points. However, about 2/3 of the X-ray bright points were not identified on the basis of the helium data alone. Once an X-ray feature is identified it is almost always possible to find an underlying dark patch of enhanced He I absorption which, however, would not a priori have been selected as a dark point. Therefore, the He I dark points, using current selection criteria, cannot be used as a one-to-one proxy for the X-ray data. He I dark points do, however, identify the locations of the stronger X-ray bright points.

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