The ultra-metal-deficient (Population III?) red giant CD 38.245 deg

Details The ultra-metal-deficient (Population III?) red giant CD 38.245 deg The ultra-metal-deficient (Population III?) red giant CD 38.245 deg

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..622b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 285, Oct. 15, 1984, p. 622-636.

Astronomy and Astrophysics

Astrophysics

116

Metallicity, Red Giant Stars, Stellar Composition, Stellar Spectrophotometry, Abundance, Carbon, Late Stars, Line Spectra, Nickel, Nitrogen, Stellar Color, Stellar Temperature

Scientific paper

The authors present photometric and high-resolution spectroscopic data on the ultra-metal-deficient red giant CD -38°245. A model atmosphere analysis yields the parameters effective temperature, surface gravity and the element abundances. As a check the same procedures were applied to the well studied Population II red giant HD 2796. CD -38°245 has [Fe/H] = -4.5, and is the most metal-deficient astronomical object currently known. The authors suggest that CD -38°245 is an extreme Population II object, as opposed to its being a member of a new population.

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