Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986iraj...17..477b&link_type=abstract
(Astronomical Science Group of Ireland, Meeting, Queen's University of Belfast, Northern Ireland, Apr. 4, 1986) Irish Astronomic
Astronomy and Astrophysics
Astronomy
3
Abundance, Cosmochemistry, Milky Way Galaxy, Star Clusters, Stellar Composition, Interstellar Chemistry, Main Sequence Stars, Stellar Gravitation, Stellar Temperature
Scientific paper
Spectroscopic and photometric data for main-sequence stars in the southern clusters NGC 2362, 3293, 4755, 6611, 6231, 6531, IC 2944, the Northern Hemisphere clusters h and Chi Per, Cep OBIII, Be 94, and a loose association obtained between April 1984-September 1985 using the South African Astronomical Observatory, Anglo-Australian, and Issac Newton telescopes are analyzed. The observed line strength and photometric data are compared with predictions derived using local thermodynamic equilibrium radiative-transfer codes. It is observed that, except for the stars of NGC 6611, the effective temperatures and gravities correlate well. Mean abundances for the southern clusters are derived and compared with the data of Lynga (1981); the good agreement between the average abundance for each cluster and those for normal objects indicate that the stars in this region formed from relatively homogeneous interstellar material.
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