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Research & Reviews : Journal of Space Science & Technology

Radial oscillation modes of delta Scuti stars KIC 2439660, KIC 3219256 and KIC 6965789 investigated using Kepler asteroseismic science data

  1. Pubudu Samarasekara ORCID iD

Abstract

With the rise of Asteroseismology, studying the interior properties of unreachable stars ispossible from Earth and Earth centered orbits. Delta Scuti stars KIC 2439660, KIC 3215692 andKIC 6965789 from the Kepler science data were used for our studies. Each star has around38750 data points within Kepler quarters of 17.1 and 17.2. After removing the null points in data,MATLAB software package was utilized to identify the best-fit curve of the frequency-amplitude data. PERIOD04 was applied to identify the oscillation frequency and the mode ofoscillation of each star. PYTHON was used for calculation and analysis of those extracted data.The pulsation constant depends on the period of peak, the effective temperature, the surfacegravity and the bolometric mass. The fundamental frequency and overtones were determined foreach star. Except 2439660, other two stars have gone up to the second overtones. But all threestars have the rotational pulsation that stands out in amplitude consideration. Q value and thephase were calculated at all the dominant peaks in each spectrum.

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