The chemical composition of Magellanic Cloud Cepheids and nonvariable supergiants

Details The chemical composition of Magellanic Cloud Cepheids and nonvariable supergiants The chemical composition of Magellanic Cloud Cepheids and nonvariable supergiants

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...79..303l&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 79, no. 2, April 1992, p. 303-329. Research supported by Robert A

Astronomy and Astrophysics

Astrophysics

105

Cepheid Variables, Chemical Composition, Magellanic Clouds, Supergiant Stars, Astronomical Spectroscopy, H Alpha Line, Metallicity, Spectral Line Width

Scientific paper

Results of abundance analyses of 14 Cepheids and nonvariable supergiants in the Magellanic Clouds are presented along with comparison data on four Galactic objects. Elemental abundances derived include Li, C, N, O, the alpha-elements, the Fe peak, and limited data on the heavy elements. Only HV 5497 in the LMC shows any detectable Li among the Cloud objects. The present CNO data, when combined with previous results, suggest a disparity between the LMC and the SMC supergiants in that the SMC stars have an essentially constant O/Fe ratio, while the LMC stars do not. The O/Fe ratios within both Clouds are lower than the ratio found in Galactic stars of similar metallicity, but are comparable to the O/Fe ratios found in Galactic supergiants. For heavier elements, previous results which indicate the light s- and r-process elements (Sr, Y, Zr) show Galactic ratios with respect to Fe, but that the heavy s- and r-process elements (Ba-Sm) are enhanced in the Clouds, are confirmed.

Affiliated with

Also associated with

No associations

Rating

The chemical composition of Magellanic Cloud Cepheids and nonvariable supergiants 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 chemical composition of Magellanic Cloud Cepheids and nonvariable supergiants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The chemical composition of Magellanic Cloud Cepheids and nonvariable supergiants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1733975