SIMBAD references

2007A&A...473..579S - Astronomy and Astrophysics, volume 473, 579-587 (2007/10-2)

New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy.

SZILADI K., VINKO J., PORETTI E., SZABADOS L. and KUN M.

Abstract (from CDS):

We define the relationship between the double-mode pulsation of Cepheids and metallicity in a more accurate way, determine the empirical metallicities of double-mode Cepheids from homogeneous, high-resolution spectroscopic data, and study of the period-ratio - metallicity dependence. The high S/N echelle spectra obtained with the FEROS spectrograph were analyzed using a self-developed IRAF script, and the iron abundances were determined by comparing with synthetic spectra assuming LTE. Accurate [Fe/H] values of 17 galactic beat Cepheids were determined. All these stars have solar or slightly subsolar metallicity. Their period ratio (P1/P0) shows strong correlation with their derived [Fe/H] values. The corresponding period ratio - metallicity relation has been evaluated.

Abstract Copyright:

Journal keyword(s): stars: variables: Cepheids - stars: atmospheres - stars: general

Simbad objects: 22

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2021.04.22-01:02:28

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