Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.248..664k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 248, Feb. 15, 1991, p. 664-669.
Astronomy and Astrophysics
Astronomy
27
Blue Stars, Early Stars, Faint Objects, Stellar Spectrophotometry, Abundance, Color-Color Diagram, Helium, Radial Velocity, Scotland, Ubv Spectra
Scientific paper
A simple analysis using low-dispersion Reticon spectroscopy and Stromgren photometry is presented for a sample of 20 apparently normal early-type stars detected in the Edinburgh-Cape faint blue object survey of high galactic latitudes. Four stars are not normal, showing high gravity or helium abundance anomalies; 12 stars appear to be at moderate distances from the galactic plane and four stars have derived z-distances greater than about 5 kpc. The sample was selected from 33 survey fields completed to B = 16.5 mag and indicates that the total galactic population of 'very high-z' B stars is only of the order 100-1000. The Dyson and Hartquist (1983) model for the formation of such objects by cloudlet-cloudlet collisions within high-velocity clouds cannot therefore be ruled out on the basis of star formation rates.
Kilkenny Dave
O'Donoghue Darragh
Stobie Robert S.
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