Peculiar and normal early-type stars in the galactic halo

Details Peculiar and normal early-type stars in the galactic halo Peculiar and normal early-type stars in the galactic halo

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...224...65c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 224, no. 1-2, Oct. 1989, p. 65-72. Research supported by SERC.

Astronomy and Astrophysics

Astrophysics

21

B Stars, Blue Stars, Early Stars, Halos, Peculiar Stars, Abundance, Helium, Metallicity, Stellar Atmospheres

Scientific paper

High resolution optical spectra of eight high latitude blue stars have been obtained. Three of the sample are identified as subdwarfs. The remaining five are analyzed for atmospheric parameters and metal and He abundances using model atmosphere techniques. Four of the sample appear to be normal B type stars 2 kpc or more from the plane. With a logarithmic surface gravity estimated to be 4.6 + or - 0.3 dex, PB 166 could be either a main sequence, horizontal branch or cool subdwarf. The nature of this star is discussed in view of its approximately normal Population I chemical composition.

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