High-resolution spectroscopic observations of B-type stars from the Edinburgh-Cape Survey - III. Completion of a magnitude range limited survey

ABSTRACT High spectral resolution (R∼ 40 000) and signal‐to‐noise ratio observations of five high Galactic latitude early‐type stars taken from the Edinburgh–Cape (EC) Faint Blue Object Survey are presented. These were required to complete a magnitude range‐limited survey of young B‐type objects wit...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2004-09, Vol.353 (2), p.633-638
Main Authors: Lynn, B. B., Keenan, F. P., Dufton, P. L., Kilkenny, D., Rolleston, W. R. J., Smoker, J. V., Ryans, R. S. I., Hambly, N., McGillivray, H. T., O'Donoghue, D.
Format: Article
Language:English
Subjects:
Galaxy: halo
stars: abundances
stars: atmospheres
stars: early-type
stars: evolution
stars: kinematics
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Summary:ABSTRACT High spectral resolution (R∼ 40 000) and signal‐to‐noise ratio observations of five high Galactic latitude early‐type stars taken from the Edinburgh–Cape (EC) Faint Blue Object Survey are presented. These were required to complete a magnitude range‐limited survey of young B‐type objects with 11 < V < 15. Of the five stars, four were rejected on the grounds that they are either subluminous (subdwarf or horizontal branch), were part of a binary system or possessed colours later than the (U−B) =−0.5 cut‐off employed. The remaining star in the data set, EC 19596‐5356, is found to exhibit normal young B‐type stellar properties. A kinematic analysis reveals that an origin in the Galactic disc appears likely for all the stars in the sample. Some statistics are drawn about the number density of young stars in the Galactic halo.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2004.08091.x