Blue stragglers in open clusters. I. NGC 2632

Details Blue stragglers in open clusters. I. NGC 2632 Blue stragglers in open clusters. I. NGC 2632

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...334..139a&link_type=abstract

Astronomy and Astrophysics, v.334, p.139-145 (1998)

Astronomy and Astrophysics

Astrophysics

9

Open Clusters And Associations: Individual: Ngc 2632, Stars: Abundances, Blue Stragglers

Scientific paper

We present the results of a spectroscopic study of four blue stragglers from old galactic open cluster NGC 2632 (Praesepe). The LTE analysis based on Kurucz's atmosphere models and synthetic spectra technique has shown that three stars, including the hottest star of the cluster HD73666, possess an uniform chemical composition: they show a solar-like abundance (or slight overabundance) of iron and an apparent deficiency of oxygen and silicon. Two stars exhibit a remarkable barium overabundance. The chemical composition of their atmospheres is typical for Am stars. One star of our sample does not share such uniform elemental distribution, being generally deficient in metals. For all stars Teff and log g values were estimated. A short discussion of the obtained results is given.

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