Published 1987 | Version v1
Book Metadata-only

Chemical composition of stars in globular clusters: a glimpse at the contribution by population II

Creators

  • 1. Univ. of Washington, Seattle (USA)

Description

The author has completed abundance analyses of stars in M4, M13, M22 and M71 from high resolution CCD spectra obtained at the Mt. Palomar coude spectrograph. Elements observed include the light metals from sodium through titanium, the iron peak, and lines of OI and CN. In addition, CO bands in stars in M4 and M22 have been analyzed by V. V. Smith (University of Texas) for the 12C/13C ratio. The derived abundances show significant departures from solar ratios for carbon, nitrogen, oxygen and the light metals, sodium and aluminum. The 12C/13C ratio allows us to calculate the percentage of CNO processed material that has mixed with the original material in the stellar atmosphere. Of particular interest are CNO-deficient stars in M4 and M13 and the dichotomy of C and N abundances in M22. These anomalies within clusters appear to be indicative of the original composition of the star rather than nucleosynthesis and mixing within the observed star

Additional details

Publishing Information

Publisher
American Chemical Society.
Imprint Place
Washington, DC (USA)
Imprint Title
194th national meeting of the American Chemical Society, Division of Nuclear Chemistry and Technology
Journal Page Range
p. 11.

Conference

Title
American Chemical Society Division of Nuclear Chemistry and Technology meeting.
Dates
30 Aug - 4 Sep 1987.
Place
New Orleans, LA (USA).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
19074552
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ALUMINIUM; CARBON; CARBON 12; CARBON 13; CHEMICAL COMPOSITION; CNO CYCLE; COSMOCHEMISTRY; ISOTOPE RATIO; NITROGEN; NUCLEAR CHEMISTRY; NUCLEOSYNTHESIS; ORIGIN; OXYGEN; SODIUM; STAR CLUSTERS; STAR EVOLUTION; STARS
Descriptors DEC
ALKALI METALS; CARBON ISOTOPES; CHEMISTRY; ELEMENTS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; ISOTOPES; LIGHT NUCLEI; METALS; NONMETALS; NUCLEI; STABLE ISOTOPES; STAR BURNING; SYNTHESIS