Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1374c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, April 1992, p. 1374-1380. Research supported by CICYT.
Astronomy and Astrophysics
Astronomy
5
Barium, Calcium, H Lines, K Lines, Metallic Stars, Stellar Activity, Cool Stars, Emission Spectra, Giant Stars, Stellar Evolution, Stellar Spectra
Scientific paper
High dispersion spectra have been obtained in order to study the activity level of ten barium stars by means of the Ca ii H and K emission flux, looking for a relation between barium intensity index and activity. Absolute magnitudes obtained from the Wilson-Bappu relationship disagree, in some cases, with the magnitudes computed from parallaxes, but this fact is not due to barium nature. Total emission fluxes, F(H + K) or RHK index, plotted versus effective temperature show a distribution similar to that of cool giant stars. The asymmetry of K emission line, [F(K2v)/F(K2r)] has been analyzed in relation with effective temperature, in this sense barium stars behave as expected of late-type giants with the only exception of two stars.
Armentia J. A.
Cornide Manuel
de Castro Elisa
Fernandez-Figueroa María José
Reglero Victor
No associations
LandOfFree
Stellar activity in barium stars. I - Analysis of H and K CA II lines in ten barium stars 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 Stellar activity in barium stars. I - Analysis of H and K CA II lines in ten barium stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar activity in barium stars. I - Analysis of H and K CA II lines in ten barium stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1733289