Faculty Publications

Fourier Coefficients Of Ogle Variables. III. Δ Scuti Stars

Document Type

Article

Keywords

δ Scu

Journal/Book/Conference Title

Acta Astronomica

Volume

48

Issue

3

First Page

509

Last Page

518

Abstract

Fourier coefficients for δ Scuti from the OGLE dark matter survey of the Galactic bulge are compared to the coefficients of similar stars, mainly High Amplitude δ Scuti and SX Phe stars. While in previous studies there appears to be a division amongst the δ 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 δ Scuti stars based upon the Φ31 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 δ Scuti stars. One variable does appear to be located beyond the Galactic bulge at a distance of approximately 21 kpc.

Department

Department of Earth Science

Original Publication Date

12-1-1998

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