CD-24 deg 9052 - A new bright and helium-rich subdwarf O star

Details CD-24 deg 9052 - A new bright and helium-rich subdwarf O star CD-24 deg 9052 - A new bright and helium-rich subdwarf O star

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155..175k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 1, Jan. 1986, p. 175-177.

Astronomy and Astrophysics

Astrophysics

1

Abundance, O Stars, Spectrograms, Spectrum Analysis, Stellar Spectrophotometry, Subdwarf Stars, Carbon, Helium, Line Spectra, Nitrogen, Thermodynamic Equilibrium

Scientific paper

CD -24°9052 has been discovered to be a bright subdwarf O star (mv ≈ 9.6). A spectral analysis based on SAAO Reticon spectra and on a grid of NLTE model atmospheres yields the following parameters: Teff = 42500K, log g = 5.0, and the helium to hydrogen ratio of 0.5 by numbers. Accordingly, CD -24°9052 belongs to the subclass of helium rich sdO's.

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