Far-ultraviolet energy distributions of the metal-poor A stars HD 109995 and HD 161817

Details Far-ultraviolet energy distributions of the metal-poor A stars HD 109995 and HD 161817 Far-ultraviolet energy distributions of the metal-poor A stars HD 109995 and HD 161817

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..213b&link_type=abstract

Astrophysical Journal, Part 1, vol. 243, Jan. 1, 1981, p. 213-216.

Astronomy and Astrophysics

Astrophysics

8

A Stars, Early Stars, Far Ultraviolet Radiation, Spectral Energy Distribution, Stellar Atmospheres, Stellar Spectra, Abundance, Atmospheric Models, Atmospheric Temperature, Iue, Metals, Size Determination, Stellar Gravitation, Stellar Mass

Scientific paper

Low-resolution IUE spectra at wavelengths between 1300 and 3400 A of the metal-poor stars HD 109995 (A1p) and HD 161817 (A4p) have been compared with model-atmosphere energy distributions computed by Kurucz (1979). Good overall agreement is found. Effective temperatures, metal abundances, and angular diameters could be determined. Assuming an absolute visual magnitude of 0.7, the previously determined gravity log = 3 yields masses of 0.5 solar masses for both stars. It is found that the theoretical UBV colors calculated earlier agree reaonably well with the ones observed for these stars.

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