Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.186..567k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 186, Feb. 1979, p. 567-573, 575-582.
Astronomy and Astrophysics
Astronomy
18
A Stars, Astronomical Photometry, Frequency Distribution, Light Curve, Variable Stars, Abundance, Fourier Analysis, Frequency Stability, Power Spectra, Stellar Magnitude, Ubv Spectra
Scientific paper
Frequency analyses of the light curves of the low-amplitude Delta Scuti variables HR 4594 and HR 8210 are presented. The analyses were performed by using the technique of Fourier analysis of unequally spaced data. The results obtained indicate that HR 8210 has a single dominant pulsation frequency of 22.9 cycles/day present throughout the 22-day time span of the data set, while HR 4594 has no dominant frequency present and even changes frequency on a time scale as short as one day. A semiamplitude of 0.0021 mag is derived for the pulsation frequency of HR 8210. Evidence of small-amplitude nonperiodic variations in the mean light level of the two stars from night to night is considered.
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