Fourier Coefficients of OGLE Variables. III. delta Scuti Stars

Details Fourier Coefficients of OGLE Variables. III. delta Scuti Stars Fourier Coefficients of OGLE Variables. III. delta Scuti Stars

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aca....48..509m&link_type=abstract

Acta Astronomica, v.48, pp.509-518, (1998).

Astronomy and Astrophysics

Astronomy

14

Delta Scu

Scientific paper

Fourier coefficients for delta Scuti from the OGLE dark matter survey of the Galactic bulge are compared to the coefficients of similar stars, mainly High Amplitude delta Scuti and SX Phe stars. While in previous studies there appears to be a division amongst the delta Scuti stars based upon the R21 parameter, such a division is not apparent in the OGLE stars. There does though appear to be a separation of the delta Scuti stars based upon the phi31 variable. This separation is not likely due to a metal variation and its cause is not known. Values for the extinction towards the Galactic bulge can be used to estimate a distance of approximately 7.6 kpc for the delta Scuti stars. One variable does appear to be located beyond the Galactic bulge at a distance of approximately 21 kpc.

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