Abundances in extremely metal-poor stars

Details Abundances in extremely metal-poor stars Abundances in extremely metal-poor stars

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...204..193g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 204, no. 1-2, Oct. 1988, p. 193-218. CNR-supported research.

Astronomy and Astrophysics

Astrophysics

182

Giant Stars, Stellar Composition, Stellar Structure, Abundance, Metallicity, Nuclear Fusion, Stellar Atmospheres, Stellar Models

Scientific paper

Abundances of several elements are derived for 13 extremely metal poor giants from blue and yellow CCD CASPEC spectra. Internal and external errors in the system of equivalent widths are discussed in some detail, as well as the use of strong (often resonance) lines for abundance analyses. The authors have found that their equivalent widhts compare well with literature values, and that once an accurate analysis of collisional damping is made, strong lines provide abundances for the program stars in agreement with those determined from weak lines. Use of absolute and differential analysis is also discussed.: it is found that an absolute analysis is preferable for the stars under consideration.

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