Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..197a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 1, 1984, p. 197-201.
Astronomy and Astrophysics
Astrophysics
15
Far Ultraviolet Radiation, Hertzsprung-Russell Diagram, Iue, Late Stars, Red Giant Stars, Ultraviolet Spectra, Chromosphere, Cosmic Rays, Long Wave Radiation
Scientific paper
Far-ultraviolet IUE echelle spectra are reported of the moderate-period RS CVn system σ Geminorum. Despite the location of the red giant primary of σ Gem in a portion of the H-R diagram where cool stellar winds are common, no evidence is found for circumstellar absorption features or blueward asymmetries in the chromospheric O I emission cores. However, observations on two consecutive days indicate significant changes in the profiles of high-excitation species, such as Si IV and C IV which probably were produced by the rotation off of the visible hemisphere of the primary of a large-scale magnetic active region identified in a previous photometric study.
Ayres Thomas R.
Linsky Jeffrey L.
Simon Theodore
No associations
LandOfFree
Sigma Geminorum (K1 III + ?) - Variability of the ultraviolet emission lines near conjunction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Sigma Geminorum (K1 III + ?) - Variability of the ultraviolet emission lines near conjunction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sigma Geminorum (K1 III + ?) - Variability of the ultraviolet emission lines near conjunction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1498483