Three stars at high galactic latitudes with peculiar helium abundances

Details Three stars at high galactic latitudes with peculiar helium abundances Three stars at high galactic latitudes with peculiar helium abundances

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...269..201d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 269, no. 1-2, p. 201-208.

Astronomy and Astrophysics

Astrophysics

3

Helium, Peculiar Stars, Stellar Composition, Stellar Spectra, Abundance, Stellar Spectrophotometry

Scientific paper

High resolution optical observations have been obtained for three high Galactic latitude hot stars (CD-43 14300 deg, PHL 382, and Feige 56) which have abnormal helium spectra. An LTE model atmosphere analysis indicates that CD-43 14300 deg is probably an intermediate helium star with relatively normal metal abundances, while PHL 382 and Feige 56 are helium weak stars with silicon and magnesium underabundances. A kinematic analysis implies that Feige 56 could have been ejected from the Galactic plane; for the other two stars, the analysis is ambiguous but favors them having been formed away from the Galactic plane. The identification of such objects provides additional evidence for the existence of young hot stars at large distances from the Galactic plane.

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