Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.265..257a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 265, NO. 2/NOV15, P. 257, 1993
Astronomy and Astrophysics
Astronomy
5
Stars: Abundances - Stars: Atmospheres - Stars: Individual: Tu Cas - Cepheids
Scientific paper
Atmospheric parameters and the abundances of 26 elements have been determined from two spectrograms, with a reciprocal dispersion of 9 Å mm-1, obtained in 1977 and 1990: Teff=5750-5900 K; log g=1.3-1.7; Vt=3.1-5.8 km s-1. The value of [Fe/H]=-0.43 indicates that TU Cas is more deficient in metals than are other double-mode Cepheids. Redetermined values of [Fe/H] for nine double-mode Cepheids in the southern hemisphere, together with our [Fe/H] value for TU Cas and Th the metallicity of the double-mode Cepheid V367 Sct (obtained from that of the open cluster NGC 6649 of which it is a member), provide a correlation of metallicity with P1/P0 for these stars.
Andrievsky Sergei. M.
Kovtjukh V. V.
Makarenko E. N.
Usenko Iu. A.
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