منابع مشابه
Detailed Chemical Abundances of Extragalactic Globular Clusters
We outline a method to measure the detailed chemical composition of ex-tragalactic (unresolved) globular clusters (GCs) from echelle spectra of their integrated light. Our goal is to use this method to measure abundance patterns of GCs in distant spiral and elliptical galaxies to constrain their formation histories. To develop this technique we have obtained a " training set " of integrated– li...
متن کاملThe Ages and Abundances of the M87 Globular Clusters
A subset of 150 globular clusters in M87 has been selected for abundance and age determinations from the sample of Paper I. This has been done solely on the basis of the signal-to-noise ratios of the spectra. Indices that measure the strength of the strongest spectral features were determined for the M87 GCs and from new data for twelve galactic GCs. Combining the new and existing data for the ...
متن کاملAbundances from the Integrated Light of Globular Clusters and Galaxies
It is currently impossible to determine the abundances and ages of the stellar populations of distant, dense stellar systems star by star. Therefore, methods to analyze the composite light of stellar systems are required. I review the modelling and analysis of integrated spectra of the stellar populations of individual globular clusters, globular cluster systems, early-type galaxies, and the bu...
متن کاملHeavy element abundances in giant stars of the globular clusters
Based on observations made with the Magellan Clay Telescope at Las Campanas Observatory.
متن کاملAbundances of UV bright stars in globular clusters
Two UV brights stars in globular clusters, ROA 5701 (ω Cen) and Barnard 29 (M 13) are analysed from highresolution UV and optical spectra. The main aim is the measurement of iron abundances from UV spectra obtained with the HST-GHRS. In addition atmospheric parameters and abundances for He, C, N, O, and Si are derived from optical spectra (ESO CASPEC) for ROA 5701 or taken from literature for B...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1988
ISSN: 0074-1809
DOI: 10.1017/s0074180900042406