KIC 10080943: a binary star with two $\gamma$ Doradus/$\delta$ Scuti hybrid pulsators. Analysis of the g modes

Abstract

We use four years of Kepler photometry to study the non-eclipsing spectroscopic binary KIC 10080943. We find both components to be $\gamma$ Doradus/$\delta$ Scuti hybrids, which pulsate in both p and g modes. We present an analysis of the g modes, which is complicated by the fact that the two sets of $\ell =1$ modes partially overlap in the frequency spectrum. Nevertheless, it is possible to disentangle them by identifying rotationally split doublets from one component and triplets from the other. The identification is helped by the presence of additive combination frequencies in the spectrum that involve the doublets but not the triplets. The rotational splittings of the multiplets imply core rotation periods of about 11 d and 7 d in the two stars. One of the stars also shows evidence of $\ell =2$ modes.

6 pages, 3 small tables, 6 figures of which 5 are colour. Grayscale printing is fine. Accepted for publication in MNRAS

References in corpus (9)

• Revised Stellar Properties of Kepler Targets for the Quarter 1-16 Transit Detection Run
• Probing the properties of convective cores through g modes: high-order g modes in SPB and gamma Doradus stars
• Asteroseismic measurement of surface-to-core rotation in a main sequence A star, KIC 11145123
• Asteroseismic measurement of slow, nearly-uniform surface-to-core rotation in the main sequence F star KIC 9244992
• A unifying explanation of complex frequency spectra of gamma Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves
• Finding binaries among Kepler pulsating stars from phase modulation of their pulsations
• Detecting non-uniform period spacings in the Kepler photometry of gamma Doradus stars: methodology and case studies
• KIC 3858884: a hybrid δ Sct pulsator in a highly eccentric eclipsing binary
• Deriving the orbital properties of pulsators in binary systems through their light arrival time delays

Cited by in corpus (41)

• Probing the interior physics of stars through asteroseismology
• The interior rotation of a sample of gamma Doradus stars from ensemble modelling of their gravity mode period spacings
• Amplitude modulation in $\delta$ Sct stars: statistics from an ensemble study of Kepler targets
• A new asteroseismic diagnostic for internal rotation in $\gamma$ Doradus stars
• Catalogue and Properties of δ Scuti Stars in Binaries
• Finding binaries from phase modulation of pulsating stars with Kepler: V. Orbital parameters, with eccentricity and mass-ratio distributions of 341 new binaries
• γ Doradus stars as test of angular momentum transport models
• Asteroseismic modelling of the two F-type hybrid pulsators KIC10080943A and KIC10080943B
• Period spacings of $\gamma$ Doradus pulsators in the \textit{Kepler} field: Rossby and gravity modes in 82 stars
• Rotation of the convective core in $\gamma$ Dor stars measured by dips in period spacings of g modes coupled with inertial modes
• Gravity-mode period spacings and near-core rotation rates of 611 $\gamma$ Doradus stars with \textit{Kepler}
• Period spacings of $\gamma$ Doradus pulsators in the Kepler field: detection methods and application to 22 slow rotators
• Phase II of the LAMOST-Kepler/K2 survey. I. Time series of medium-resolution spectroscopic observations
• Deciphering the oscillation spectrum of $\gamma$ Doradus and SPB stars
• Binary Asteroseismic Modelling: isochrone-cloud methodology and application to Kepler gravity-mode pulsators
• Constraining stellar evolution theory with asteroseismology of $\gamma$ Doradus stars using deep learning
• KIC 10080943: An eccentric binary system containing two pressure- and gravity-mode hybrid pulsators
• KIC 4142768: An Evolved Gamma Doradus/Delta Scuti Hybrid Pulsating Eclipsing Binary with Tidally Excited Oscillations
• The effect of tides on near-core rotation: analysis of 35 Kepler $\gamma$ Doradus stars in eclipsing and spectroscopic binaries
• Kepler Observations of the Asteroseismic Binary HD 176465
• Finding binaries from phase modulation of pulsating stars with Kepler. IV. Detection limits and radial velocity verification
• Stellar Photospheric Abundances as a Probe of Disks and Planets
• Astrophysical properties of 15062 Gaia DR3 gravity-mode pulsators: pulsation amplitudes, rotation, and spectral line broadening
• Tango of celestial dancers: A sample of detached eclipsing binary systems containing g-mode pulsating components. A case study of KIC9850387
• Asteroseismology of hybrid $\delta$ Scuti--$\gamma$ Doradus pulsating stars
• KIC 10736223: An Algol-type eclipsing binary just undergone the rapid mass-transfer stage
• Eclipsing Systems with Pulsating Components (Types β Cep, δ Sct, γ Dor or Red Giant) in the Era of High-Accuracy Space Data
• Detection of Solar-Like Oscillations, Observational Constraints, and Stellar Models for $\theta$ Cyg, the Brightest Star Observed by the {\it Kepler} Mission
• Forward modeling the orbits of companions to pulsating stars from their light travel time variations
• Binary star detectability in $Kepler$ data from phase modulation of different types of oscillations
• The traditional approximation of rotation for rapidly rotating stars and planets. II. Deformation and differential rotation
• Asteroseismology of KIC 7107778: a binary comprising almost identical subgiants
• Constraining the near-core rotation of the gamma Doradus star 43 Cygni using BRITE-Constellation data
• Misclassified B stars in the Kepler field
• KIC~8975515: a fast-rotating ($\gamma$ Dor - $\delta$ Sct) hybrid star with Rossby modes and a slower $\delta$ Sct companion in a long-period orbit
• Mode coupling coefficients between the convective core and radiative envelope of $\gamma$Doradus and slowly pulsating B stars
• Asteroseismology of the young open cluster NGC 2516 II. Constraining cluster age using gravity-mode pulsators
• Modelling $\delta$ Scuti pulsations: A new grid of p, g, and f modes across pre-main-sequence to post-main-sequence evolution
• KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis
• KIC 6951642: confirmed Kepler $\gamma$ Doradus-$\delta$ Scuti star with intermediate to fast rotation in a possible single-lined binary system
• The γ Dor stars as revealed by Kepler : A key to reveal deep-layer rotation in A and F stars