The empirical abundance calibrations for Washington photometry of Population II giants

Details The empirical abundance calibrations for Washington photometry of Population II giants The empirical abundance calibrations for Washington photometry of Population II giants

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..762g&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Aug. 1986, p. 762-771.

Astronomy and Astrophysics

Astronomy

31

Abundance, Calibrating, Giant Stars, Late Stars, Stellar Spectrophotometry, Iron, Star Clusters

Scientific paper

Based on a large sample of stars with accurate spectroscopic abundance determinations, a reexamination of the abundance calibrations of the Washington system for late-type giants with Fe/H abundance ratios of less than -0.5 is presented. The Fe abundance sensitivity of the Delta(M-T1) index is found to be limited for stars more metal-poor than Fe/H abundances of about -1, while the Delta (C-M) index is shown to be sensitive to Fe abundances throughout the entire range of known stellar abundances. Observations of a number of giants in the 47 Tuc and M 4 globular clusters demonstrate that the system can differentiate CN-strong or CH-strong giants from normal giants most effectively for giants more metal-rich than 0.1 solar, and the Delta(C-M) index is found to be much more sensitive to Fe abundance than CN or CH strength. An Fe/H abundance value of -0.85 + or - 0.1 for 47 Tuc is derived which is in good agreement with previous results and which contradicts the suggestion of a significantly lower Fe abundance.

Affiliated with

Also associated with

No associations

Rating

The empirical abundance calibrations for Washington photometry of Population II giants 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 empirical abundance calibrations for Washington photometry of Population II giants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The empirical abundance calibrations for Washington photometry of Population II giants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-894432