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A study of Variability of the Marginal Am star HD 176843 observed in the Kepler field

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arxiv 1904.00367 v1 pith:UE6OCTX4 submitted 2019-03-31 astro-ph.SR

classification astro-ph.SR
keywords keplerradialstarvelocitymarginalvariationsdatafield
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abstract

We present results of a study of the variability of the marginal Am star HD\,176843 observed in the {\it Kepler} field. {\it Kepler} photometry and ground-based spectroscopy are used to investigate the light variations of the star. HD\,176843 is classified as a marginal Am star that shows $\delta$\ Sct type pulsations. From an analysis of the {\it Kepler} time series, we find that the light curve of HD\,176843 is dominated by three modes with frequencies $f_{1}$=0.1145, $f_{2}$=0.0162 and $f_{3}$=0.1078 d$^{-1}$. The amplitude of the radial velocity variations of about 10 km/s is much more than the radial velocity errors and allows us to conclude clear radial velocity variations. Using the radial velocity data and the adopted spectra, the orbital solution of HD\,176843 is also obtained with an orbital period of 34.14 days. However, the available photometric data show no significant evidence for any possible motion in the binary system.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Re-examining Super-Nyquist Frequencies of 68 $\delta$ Scuti Stars Utilizing the Kepler Long Cadence Photometry

    astro-ph.SR 2025-07 conditional novelty 5.0 of 10

    Six frequencies in four delta Scuti stars are actually alias images of super-Nyquist signals, identified by re-analyzing Kepler long-cadence data with the sliding Lomb-Scargle periodogram.

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