Hostname: page-component-7479d7b7d-t6hkb Total loading time: 0 Render date: 2024-07-13T00:29:24.695Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectral Characteristics of A-Type Stars in the Galactic Halo

Published online by Cambridge University Press:  12 April 2016

C.J. Corbally  and
R.O. Gray
C.J. Corbally
Affiliation:
Vatican Observatory Research Group, University of Arizona, Tucson AZ 85721, USA
R.O. Gray
Affiliation:
Department of Physics and Astronomy, Appalachian State University, Boone NC 28608, USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Among 67 early A-type stars at high galactic latitudes, selected to have both small m1 and large c1 Strömgren photometric indices, we find about one third to have quite normal dwarf or subgiant spectra at MK classification dispersion. Those stars with peculiarities included 10 new λ Bootis stars, though none of these appeared significantly evolved. We wonder whether some of the metal-weak dwarf stars in our set may be field horizontal-branch equivalents of the blue, downward-curving, low-luminosity end of the blue horizontal-branch stars.

Type
IV. Related Stars
Information
International Astronomical Union Colloquium , Volume 138: Peculiar versus Normal Phenomena in A-Type and Related Stars , 1993 , pp. 432 - 436
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Charbonneau, P. 1991, ApJ 372, L33 CrossRefGoogle Scholar
Corbally, C.J., and Gray, R.O. 1990, in Poster Papers Presented at the 145th Symposium of the IAU ed. Michaud, G., Tutukov, A., Bergevin, M. (Univ. of Montreal), p.55 Google Scholar
Dworetsky, M. 1984, in The MK Process and Stellar Classification, ed. Garrison, R.F. (David Dunlap Observatory), p.389 Google Scholar
Gray, R.O. 1988, AJ, 95, 220 CrossRefGoogle Scholar
Gray, R.O., and Corbally, C.J. 1992, in IAU Coll., No. 138, Peculiar Versus Normal Phenomena in A- Type and Related Stars, ed. Castelli, F. and Dworetsky, M.M. Google Scholar
Lambert, D.L. 1991, in IAU Symp., No. 145, Evolution of Stars: The Photospheric Abundance Connection, ed. Michaud, G. and Tutukov, A. (Dordrecht: Kluwer), p.451 CrossRefGoogle Scholar
MacConnell, D.J., Frye, R.L., Bidelman, W.P., Bond, H.E. 1971, PASP, 83, 98 CrossRefGoogle Scholar
Oke, J.B., Greenstein, J.L., and Gunn, J. 1966, in Stellar Evolution, ed. Stein, R.F. and Cameron, A.G. (New York: Plenum), p.399 Google Scholar
Parthasarathy, M. 1992, IAU Coll., No. 138, Peculiar Versus Normal Phenomena in A- Type and Related Stars, ed. Castelli, F. and Dworetsky, M.M. Google Scholar
Philip, A.G.D. 1984, VVO Contributions, No. 2, 1 Google Scholar