Model atmosphere and kinematical analyses of early-type stars from the Edinburgh-Cape Survey

H.R.M. Magee, Philip Dufton, Francis Keenan, W.R.J. Rolleston, D. Kilkenny, D. O'Donoghue, C. Koen, R.S. Stobie

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We present high-resolution spectroscopic observations of 21 B- type stars, selected from the Edinburgh-Cape Blue Object Survey. Model atmosphere analyses confirm that 14 of these stars are young, main-sequence B-type objects with Population I chemical compositions. The remaining seven are found to be evolved objects, including subdwarfs, horizontal branch and post-AGB objects. A kinematical analysis shows that all 14 young main-sequence stars could have formed in the disc and subsequently been ejected into the halo. These results are combined with the analysis of a previous subsample of stars taken from the Survey. Of the complete sample, 31 have been found to be young, main-sequence objects, with formation in the disc, and subsequent ejection into the halo, again being found to be a plausible scenario.
Original languageEnglish
Pages (from-to)747-756
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume324
Issue number3
Publication statusPublished - 01 Jul 2001

ASJC Scopus subject areas

  • Space and Planetary Science

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