A white-dwarf search at the south galactic pole

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Photometry, Southern Hemisphere, White Dwarf Stars, Astronomical Catalogs, Color, Halos

Scientific paper

The Lowell Observatory G and GD stars to visual magnitude 17 and within 10 deg of the south galactic pole have been observed in a modified Stromgren photometric system. Twenty-three white dwarfs were found, including five already known, leading to a number density for these blue degenerates of 1 per 0.001 cu pc. Forty-two of the stars are probably halo objects of spectral types F and G, and the remaining 23 stars include blue stragglers, horizontal-branch stars, and one possible ultrashort-period halo variable.

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