Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apjs...66...51a&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 66, Feb. 1988, p. 51-68.
Astronomy and Astrophysics
Astrophysics
55
Dwarf Stars, Giant Stars, Late Stars, Red Shift, Stellar Spectra, Emission Spectra, Far Ultraviolet Radiation, Iue, Line Spectra
Scientific paper
Results are presented from an IUE SWP camera investigation of the occurrence of gasdynamic flows, analogous to the downdrafts of 10 to the 5th K material observed over magnetic active regions of the sun, among stars of late spectral type. The SWP calibration spectra study conducted documents the existence of local, small, persistent distortions of the echelle wavelength scales that are of unknown origin. Attention is given to the enormous widths of the stellar high-excitation emission lines in both the dwarfs and the giants, with respect to the comparatively small, subsonic Doppler shifts; the widths are typically an order of magnitude greater than the redshifts.
Ayres Thomas R.
Engvold Oddbjörn
Jensen Eberhard
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