The discovery and analysis of a rich p-mode oscillation spectrum in the AP star HD 119027

Details The discovery and analysis of a rich p-mode oscillation spectrum in the AP star HD 119027 The discovery and analysis of a rich p-mode oscillation spectrum in the AP star HD 119027

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260....9m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 1, p. 9-20.

Astronomy and Astrophysics

Astronomy

10

A Stars, P Waves, Peculiar Stars, Stellar Oscillations, Least Squares Method, Light Curve, Stellar Luminosity, Stellar Spectrophotometry

Scientific paper

Results of observations of the new rapidly oscillating Ap star HD 119027 are reported. It is found that HD 119027 pulsates with at least five nearly equally spaced frequencies in the vicinity of 1.9 mHz, with a spacing of 26 microhertz between the frequencies. The data, however, cannot be completely described by these five frequencies. There is a residual mound of amplitude in the vicinity of 1.9 mHz for all data subsets, suggesting a nonperiodic amplitude or phase modulation of these five frequency components. There is no indication of the first or higher harmonics of the frequencies at 1.9 mHz.

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