Fourier Coefficients of OGLE Variables. IV. RR Lyr Stars in omega Cen and towards 47 Tuc

Details Fourier Coefficients of OGLE Variables. IV. RR Lyr Stars in omega Cen and towards 47 Tuc Fourier Coefficients of OGLE Variables. IV. RR Lyr Stars in omega Cen and towards 47 Tuc

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aca....50..249m&link_type=abstract

Acta Astronomica, v.50, pp.249-268, (2000).

Astronomy and Astrophysics

Astronomy

3

Stars: Variables: Rr Lyr, Stars: Fundamental Parameters, Stars: Oscillations

Scientific paper

Fourier coefficients for RR Lyr stars found by the OGLE survey in omega Cen and in the direction of 47 Tuc are presented. A total of 180 light curves were examined. Physical parameters for the stars including mass, luminosity, effective temperature and metallicity were derived using theoretical relations based upon the Fourier coefficients. The well known metallicity variation is seen in the omega Cen RR Lyr variables. The distance modulus to omega Cen is estimated to be =13.73+/-0.07 mag, while the RR Lyr stars seen in the direction of 47Tuc are located in the Small Magellanic Cloud, and have an estimated distance modulus of =18.78+/-0.08 mag.

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