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

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

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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 language	English
Pages (from-to)	747-756
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	324
Issue number	3
Publication status	Published - 01 Jul 2001

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Space and Planetary Science

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@article{3749755a05144f64aaa370af36f197fc,

title = "Model atmosphere and kinematical analyses of early-type stars from the Edinburgh-Cape Survey",

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.",

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

year = "2001",

month = jul,

day = "1",

language = "English",

volume = "324",

pages = "747--756",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Model atmosphere and kinematical analyses of early-type stars from the Edinburgh-Cape Survey. / Magee, H.R.M.; Dufton, Philip ; Keenan, Francis; Rolleston, W.R.J.; Kilkenny, D.; O'Donoghue, D.; Koen, C.; Stobie, R.S.

In: Monthly Notices of the Royal Astronomical Society, Vol. 324, No. 3, 01.07.2001, p. 747-756.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Model atmosphere and kinematical analyses of early-type stars from the Edinburgh-Cape Survey

AU - Magee, H.R.M.

AU - Dufton, Philip

AU - Keenan, Francis

AU - Rolleston, W.R.J.

AU - Kilkenny, D.

AU - O'Donoghue, D.

AU - Koen, C.

AU - Stobie, R.S.

PY - 2001/7/1

Y1 - 2001/7/1

N2 - 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.

AB - 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.

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M3 - Article

VL - 324

SP - 747

EP - 756

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -