KIC 12602250: A low-amplitude Double-mode $\delta$ Scuti star with Amplitude Modulation

Abstract

We propose for the first time that KIC 12602250 is a low-amplitude radial double-mode $\delta$ Scuti star with amplitude modulation. The detailed frequency analysis is given for the light curve of KIC 12602250 which is delivered from the Kepler mission. The Fourier analysis of the long cadence data (i.e. Q0 - Q17, spanning 1471 days) reveals that the variations of the light curve are dominated by the strongest mode with frequency F0 = 11.6141 ${\mathrm{d}}^{-1}$, suggesting that KIC 12602250 is a $\delta$ Scuti star. The other independent mode F1 = 14.9741 ${\mathrm{d}}^{-1}$ is newly detected. The amplitude of the light variations of \target is $\sim$ 0.06 mag, which indicates that this is a low-amplitude $\delta$ Scuti star, but the ratio of F0/F1 is estimated as 0.7756 which is typical of HADS, and a slow amplitude growth is detected in F1 and $f_3$, which could be due to stellar evolution, suggesting that KIC 12602250 could be a post main sequence $\delta$ Scuti which is crossing the instability strip for the first time.

References in corpus (32)

• emcee: The MCMC Hammer
• Kepler Input Catalog: Photometric Calibration and Stellar Classification
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• Kepler Asteroseismology Program: Introduction and First Results
• The Kepler characterization of the variability among A- and F-type stars. I. General overview
• Initial Characteristics of Kepler Short Cadence Data
• Amplitude modulation in $\delta$ Sct stars: statistics from an ensemble study of Kepler targets
• The asteroseismic potential of Kepler: first results for solar-type stars
• Super-Nyquist asteroseismology with the Kepler Space Telescope
• Global stellar variability study in the field-of-view of the Kepler satellite
• A detection threshold in the amplitude spectra calculated from Kepler data obtained during K2 mission
• Kepler photometry of KIC 10661783: a binary star with total eclipses and delta Scuti pulsations
• High frequency A-type pulsators discovered using SuperWASP
• Regularities in frequency spacings of Delta Scuti stars: The Kepler star KIC 9700322
• Close frequency pairs in Delta Scuti stars
• Pulsational Frequency and Amplitude Modulation in the $\delta$\,Sct star KIC\,7106205
• The Kepler Asteroseismic Investigation: Scientific goals and the first results
• Amplitude variability or close frequencies in pulsating stars? The Delta Scuti star FG Vir
• Relationship between low and high frequencies in Delta Scuti stars: Photometric Kepler and spectroscopic analyses of the rapid rotator KIC 8054146
• Pulsational amplitude growth of the star KIC 3429637 (HD 178875) in the context of Am and rho Puppis stars
• Incidence of high-amplitude delta Scuti type variable stars
• A Weak Modulation Effect Detected in the Light Curves of KIC 5950759: Intrinsic or Instrumental Effect?
• MIARMA: An information preserving method for filling gaps in time series. Application to CoRoT light curves
• The triple-mode pulsating variable V823 Cas
• AE Ursae Majoris -- a $\delta$ Scuti Star in the Hertzsprung Gap
• Photometry of GSC 762-110, a new triple-mode radially pulsating star
• A double-modulation effect detected in a double-mode high-amplitude $\delta$ Scuti star: KIC 10284901
• Pulsations of the High-Amplitude $\delta$ Scuti Star YZ Bootis
• Impact of gaps in the asteroseismic characterization of pulsating stars. I. On the efficiency of pre-whitening
• Nonradial and radial period changes in the Delta Scuti star 4 CVn I. 700+ nights of photometry
• KIC 10975348: A double-mode or triple-mode high-amplitude $\delta$ Scuti star?
• Self-consistent method to extract non-linearities from pulsating stars light curves I. Combination frequencies

Cited by in corpus (4)

• Frequency analysis of KIC 1573174 : shedding light on the nature of HADS stars
• Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed $\delta$ Scuti stars
• KIC 10855535: An elegant Delta Scuti pulsator with Amplitude and Phase Modulation
• IZ Tel and UW Vir: Southern oscillating eclipsing Algol systems with active mass transfer