The nature of the four blue halo stars of Tobin

Details The nature of the four blue halo stars of Tobin The nature of the four blue halo stars of Tobin

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..113d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 113-116.

Astronomy and Astrophysics

Astrophysics

17

Blue Stars, Horizontal Branch Stars, Stellar Spectrophotometry, Absorption Spectra, Angular Velocity, Iue, Stellar Atmospheres, Visible Spectrum

Scientific paper

Model atmosphere techniques presently used to analyze visual spectra of Tobin's (1986) four blue halo star IUE spectra have yielded results confirming the population I character of Feige 40. H.O.+23 deg B, and H.O.+41 deg B. A 2-3 kpc distance from the galactic plane corresponds to these results. The fourth star, PB 166, is likely to be a little-evolved horizontal-branch star with a distance of only 1 kpc. Radial velocities determined from coude spectra are consistent with the evolutionary state derived.

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