Asteroseismology of two Kepler detached eclipsing binaries

Abstract

The present work contains light curve, spectroscopic and asteroseismic analyses for KIC 04851217 and KIC 10686876. These systems are detached eclipsing binaries hosting a pulsating component of delta Scuti type and have been observed with the unprecedented accuracy of the Kepler space telescope. Using ground based spectroscopic observations, the spectral types of the primary components of the systems were estimated as A6V and A5V for KIC 04851217 and KIC 10686876, respectively, with an uncertainty of one subclass. The present spectral classification together with literature radial velocities curves were used to model the light curves of the systems and, therefore, to calculate the absolute parameters of their components with higher certainty. The photometric data were analysed using standard eclipsing binary modeling techniques, while their residuals were further analysed using Fourier transformation techniques in order to extract the pulsation frequencies of their host delta Scuti stars. The oscillation modes of the independent frequencies were identified using theoretical models of delta Scuti stars. The distances of the systems were calculated using the relation between the luminosity and the pulsation period for delta Scuti stars. The physical and the oscillation properties of the pulsating components of these systems are discussed and compared with others of the same type. Moreover, using all the currently known cases of delta Scuti stars in detached binaries, updated correlations between orbital and dominant pulsation periods and between log g and pulsation periods were derived. It was found that the proximity of the companion plays significant role to the evolution of the pulsational frequencies.

17 pages, 13 figures, 8 tables, accepted for publication in A&A

References in corpus (39)

• The Gaia mission
• The Transiting Exoplanet Survey Satellite
• The K2 Mission: Characterization and Early results
• TrES-1: The Transiting Planet of a Bright K0V Star
• The Kepler Catalog of Stellar Flares
• {\em Gaia}-derived luminosities of {\em Kepler} A/F stars and the pulsator fraction across the δ Scuti instability strip
• A unifying explanation of complex frequency spectra of gamma Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves
• Activity indicators and stellar parameters of the Kepler targets. An application of the ROTFIT pipeline to LAMOST-Kepler stellar spectra
• The first view of $\delta$ Scuti and $\gamma$ Doradus stars with the TESS mission
• The role of turbulent pressure as a coherent pulsational driving mechanism: the case of the delta Scuti star HD 187547
• Identification, Classifications, and Absolute Properties of 773 Eclipsing Binaries Found in the TrES Survey
• The Catalogue of Stellar Parameters from the Detached Double-Lined Eclipsing Binaries in the Milky Way
• The period-luminosity relation for delta Scuti stars using Gaia DR2 parallaxes
• WASP 1628+10 - an EL CVn-type binary with a very-low-mass stripped-red-giant star and multi-periodic pulsations
• Survey for δ Sct components in eclipsing binaries and new correlations between pulsation frequency and fundamental stellar characteristics
• Eclipsing binary stars with a $\delta$ Scuti component
• The single-sided pulsator CO~Camelopardalis
• Deriving the orbital properties of pulsators in binary systems through their light arrival time delays
• KIC 8262223: A Post-Mass Transfer Eclipsing Binary Consisting of a Delta Scuti Pulsator and a Helium White Dwarf Precursor
• LAMOST Views $\delta$ Scuti Pulsating Stars
• Validation of the Frequency Modulation technique applied to the pulsating delta Sct - gamma Dor eclipsing binary star KIC 8569819
• Absolute Properties of the Pulsating Post-mass Transfer Eclipsing Binary OO Draconis
• HIDES spectroscopy of bright detached eclipsing binaries from the $Kepler$ field - III. Spectral analysis, updated parameters, and new systems
• Radial Velocities of 41 Kepler Eclipsing Binaries
• Search for exoplanets around pulsating stars of A--F type in Kepler Short Cadence data and the case of KIC 8197761
• HD 99458: First time ever Ap-type star as a $\delta$ Scuti pulsator in a short period eclipsing binary?
• KIC 10736223: An Algol-type eclipsing binary just undergone the rapid mass-transfer stage
• Ten Kepler Eclipsing Binaries Containing the Third Components
• Asteroseismology of Kepler Algol type oscillating eclipsing binaries
• KIC 11401845: An Eclipsing Binary with Multiperiodic Pulsations and Light Travel Time
• The oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep: Photometric analysis, frequency search and evolutionary status
• Variability in the Massive Open Cluster NGC 1817 from K2: A Rich Population of Asteroseismic Red Clump, Eclipsing Binary, and Main Sequence Pulsating Stars
• Photometric study of the pulsating, eclipsing binary OO Dra
• A comprehensive study of six Algol type binaries
• The Pulsating Eclipsing Binary TIC 309658221 in a 7.59 Day Orbit
• Effect of convective outer layers modeling on non-adiabatic seismic observables of delta Scuti stars
• TESS Photometry of the Eclipsing $\delta$ Scuti Star AI Hydrae
• First frequency analysis for three new members of the group of eclipsing binaries with a pulsating component
• Spectroscopic confirmation of the binary nature of the hybrid pulsator KIC 5709664 found with the frequency modulation method

Cited by in corpus (5)

• Then and now: A new look at the eclipse timing variations of hierarchical triple star candidates in the primordial $Kepler$-field, revisited by TESS
• Comprehensive analysis of southern eclipsing systems with pulsating components: The cases of HM Pup, V632 Sco and TT Vel
• KIC 10417986: Spectroscopic confirmation of the nature of the binary system with a δ Scuti component
• Comprehensive study of five candidate delta Scuti-type pulsators in detached eclipsing binaries
• Asteroseismology of four eccentric double-lined spectroscopic eclipsing binaries