Physical parameters of pulsating variables with periods between one and three days. I - Photometry and metallicities

Details Physical parameters of pulsating variables with periods between one and three days. I - Photometry and metallicities Physical parameters of pulsating variables with periods between one and three days. I - Photometry and metallicities

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26as...64..261d&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 64, no. 2, May 1986, p. 261-274. SNSF-supported research.

Physics

23

Astronomical Photometry, Cepheid Variables, Metallicity, Stellar Composition, Stellar Oscillations, Stellar Physics, Astronomical Photography, Electrophotometry, Histograms, Light Curve

Scientific paper

Based on a new set of observations in the Walraven VBLUW system, obtained at the European Southern Observatory, La Silla, Chile, Fe/H(VBLU) values of 57 pulsating variables, mostly with periods between one and three days,. are determined. The distribution of the metal abundances is shown to be essentially bimodal. All the variables with Fe/H ratios of less than -0.4 were classified by Diethelm (1983) as RRd stars. They are identified as the galactic field counterpart of the Cepheids in the same period range found in globular clusters.

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