The calcium abundances in NGC 6584, NGC 6864, and NGC 6981

Details The calcium abundances in NGC 6584, NGC 6864, and NGC 6981 The calcium abundances in NGC 6584, NGC 6864, and NGC 6981

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..235r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, March 1990, p. 235-241.

Astronomy and Astrophysics

Astronomy

3

Abundance, Calcium, Globular Clusters, Horizontal Branch Stars, Stellar Spectra, Balmer Series, Forbidden Transitions, Interstellar Extinction, K Lines

Scientific paper

Intermediate-resolution spectra of horizontal-branch stars in the clusters NGC 6584, NGC 6864, and NGC 6981 are analyzed to derive calcium abundances. Measurements of the Ca II K line and higher Balmer line strengths indicate that the three clusters have near-identical calcium abundance with Ca/H = -1.01, -1.07, and -1.09 for NGC 6584, NGC 6864, and NGC 6981, respectively. The interstellar reddening, E(B - V), is found to be 0.11 for both NGC 6864 and NGC 6981. The less-precise determination for NGC 6864 agrees well with previous photometric determinations, but the value for NGC 6981 is higher than the value E(B - V) = 0.03 compiled by Webbink (1985). The resulting values of Fe/H = -1.5 are in good agreement with previous determinations.

Affiliated with

Also associated with

No associations

Rating

The calcium abundances in NGC 6584, NGC 6864, and NGC 6981 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 The calcium abundances in NGC 6584, NGC 6864, and NGC 6981, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The calcium abundances in NGC 6584, NGC 6864, and NGC 6981 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1250268