Observations of the CA II K line in Hel0830A dark points on August 3, 1985

Details Observations of the CA II K line in Hel0830A dark points on August 3, 1985 Observations of the CA II K line in Hel0830A dark points on August 3, 1985

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nascp2442..377h&link_type=abstract

In NASA. Goddard Space Flight Center Coronal and Prominence Plasmas p 377-381 (SEE N87-20871 13-92)

Astronomy and Astrophysics

Astronomy

Brightness, Chromosphere, Coronal Holes, Flow Velocity, Radio Astronomy, Line Spectra, Solar Wind, Spectroheliographs

Scientific paper

Spectroheliograms taken in the light of He I 10830 A at the National Solar Observatory Vacuum Telescope on Kitt Peak were used to identify coronal holes and bright points (BPs). Target points were identified, coordinates calculated, and spectra recorded. For each spectrum, the difference in wavelength between the Ca II K minimum and the FeI reference line was calculated. It was noteworthy that the overall effect is a blueshift. It should be noted that if material of chromospheric density moves outward at this velocity, it could supply the mass flux of the solar wind if this chromospheric flow was concentrated in a few dozen sources, each of a diameter of a few arc seconds.

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