Zeta-1 and Zeta-2 RETICULI - A puzzling solar-type twin system

Details Zeta-1 and Zeta-2 RETICULI - A puzzling solar-type twin system Zeta-1 and Zeta-2 RETICULI - A puzzling solar-type twin system

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177..204d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. 204-216.

Astronomy and Astrophysics

Astrophysics

12

Abundance, Helium, Line Spectra, Stellar Luminosity, Stellar Temperature, H Lines, K Lines, Metallicity, Ultraviolet Radiation

Scientific paper

The authors report the detailed analysis of the solar type stars ζ1 and ζ2Ret. They have solar heavy element abundances and their gravity is found to be abnormally large: log g = 4.7. This, together with their luminosity, typical of subdwarfs, strongly supports the idea that they are significantly helium-rich, with n(He)/n(H) = 0.22±0.04.

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