Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..385v&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 92, Aug.-Sept. 1980, p. 385-391. NASA-supported research.
Astronomy and Astrophysics
Astronomy
194
Calcium, Chromosphere, H Lines, K Lines, Main Sequence Stars, Stellar Spectra, G Stars, Hertzsprung-Russell Diagram, M Stars, Milky Way Galaxy
Scientific paper
Fluxes in 1 A bands at the centers of the H and K lines are being measured in main-sequence F-G-K-M stars in the northern half of the Woolley et al. (1970) 'Catalog of stars within twenty-five parsecs of the sun', in a survey not yet completed. Results for 486 stars are presented in the form of flux-color diagrams and discussed in light of evidence that chromospheric activity declines with age in main-sequence stars. Support is noted for the reality of the Sirius moving group. The relative numbers of more-active (Hyades-like) and less-active (solar-like) F-G stars are tolerably in agreement with a nearly constant rate of formation, but there exists an apparent deficiency in the number of F-G stars exhibiting intermediate activity. The possibility that the gap is an accidental characteristic of the sample will be investigated by extending the survey to southern declinations and greater distances.
Preston George W.
Vaughan Arthur Harris
No associations
LandOfFree
A survey of chromospheric CA II H and K emission in field stars of the solar neighborhood 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 A survey of chromospheric CA II H and K emission in field stars of the solar neighborhood, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A survey of chromospheric CA II H and K emission in field stars of the solar neighborhood will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1275888