Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284..437k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 2, p. 437-446
Astronomy and Astrophysics
Astrophysics
60
Abundance, B Stars, Chemical Composition, Chemical Elements, Metallicity, Open Clusters, Astronomical Photometry, Astronomical Spectroscopy, Line Spectra, Local Thermodynamic Equilibrium
Scientific paper
The chemical composition of the open cluster NGC 6231 has been analyzed as part of a study, in which we examine the size of the galactic metallicity gradient based on spectroscopic analysis of young clusters in the galactic plane. Stellar parameters (effective temperature, gravity, microturbulence) and chemical abundances of 10 unevolved B-stars NGC 6231 are given. Line blanketed Local Thermodynamic Equilibrium (LTE) model atmospheres and NLTE line formation calculations were used for the abundance determination of C, N, O, Mg, Al, and Si; LTE line formation calculations were used for the abundance determination of Ne, S, and Fe. All elements except neon show an average underabundance of 0.1 - 0.3 dex with respect to the solar value, which is in good agreement with results obtained earlier for B-type field stars and B-stars in young associations of the solar neighborhood. Among the cluster stars abundance differences of 0.2 -0.5 dex may be observed, which appear to be incompatible with estimated abundance determination errors under the assumption of complete mixing of primordial matter from which the cluster stars were formed.
Kilian Joe
Montenbruck Oliver
Nissen Poul Erik
No associations
LandOfFree
The galactic distribution of chemical elements as derived from B-stars in open clusters. 1: NGC 6231: Stellar parameters and chemical abundances 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 galactic distribution of chemical elements as derived from B-stars in open clusters. 1: NGC 6231: Stellar parameters and chemical abundances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The galactic distribution of chemical elements as derived from B-stars in open clusters. 1: NGC 6231: Stellar parameters and chemical abundances will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1254164