Four bright eclipsing binaries with gamma Doradus pulsating components: CM Lac, MZ Lac, RX Dra and V2077 Cyg

Abstract

The study of pulsating stars in eclipsing binaries holds the promise of combining two different ways of measuring the physical properties of a star to obtain improved constraints on stellar theory. Gravity (g) mode pulsations such as those found in $\gamma$ Doradus stars can be used to probe rotational profiles, mixing and magnetic fields. Until recently few $\gamma$ Doradus stars in eclipsing binaries were known. We have discovered g-mode pulsations in four detached eclipsing binary systems from light curves obtained by the Transiting Exoplanet Survey Satellite (TESS) and present an analysis of their eclipses and pulsational characteristics. We find unresolved g-mode pulsations at frequencies 1--1.5 d${}^{-1}$ in CM Lac, and measure the masses and radii of the component stars from the TESS data and published radial velocities. MZ Lac shows a much richer frequency spectrum, including pressure modes and tidally-excited g-modes. RX Dra is in the northern continuous viewing zone of TESS so has a light curve covering a full year, but shows relatively few pulsation frequencies. For V2077 Cyg we formally measure four pulsation frequencies, but the available data are inadequate to properly resolve the g-mode pulsations. V2077 Cyg also shows total eclipses, with which we obtain the first measurement of the surface gravity of the faint secondary star. All four systems are bright and good candidates for detailed study. Further TESS observations are scheduled for all four systems, with much improved temporal baselines in the cases of RX Dra and V2077 Cyg.

arXiv commentAccepted for publication in MNRAS. 11 pages, 8 figures, 5 tables. This is the authors' version of the accepted manuscript

References in corpus (67)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Transiting Exoplanet Survey Satellite
• Kepler Eclipsing Binary Stars. VII. The Catalog of Eclipsing Binaries Found in the Entire Kepler Data-Set
• Nominal values for selected solar and planetary quantities: IAU 2015 Resolution B3
• Eclipsing binaries in open clusters. II. V453 Cyg in NGC 6871
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Gamma Doradus Stars: Defining a New Class of Pulsating Variables
• Hybrid gamma Doradus - delta Scuti pulsators: New insights into the physics of the oscillations from Kepler observations
• The interior rotation of a sample of gamma Doradus stars from ensemble modelling of their gravity mode period spacings
• {\em Gaia}-derived luminosities of {\em Kepler} A/F stars and the pulsator fraction across the δ Scuti instability strip
• Internal mixing of rotating stars inferred from dipole gravity modes
• KIC 4544587: an Eccentric, Short Period Binary System with delta Sct Pulsations and Tidally Excited Modes
• Eclipsing binaries in open clusters. III. V621 Per in chi Persei
• A unifying explanation of complex frequency spectra of gamma Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves
• Heartbeat Stars, Tidally Excited Oscillations, and Resonance Locking
• A method for the direct determination of the surface gravities of transiting extrasolar planets
• Characterising the observational properties of δ Sct stars in the era of space photometry from the Kepler mission
• A new method to compute limb-darkening coefficients for stellar atmosphere models with spherical symmetry: the space missions TESS, Kepler, Corot, and MOST
• The solar-type eclipsing binary system LL Aquarii
• Evidence for nonlinear resonant mode coupling in the Beta Cep star HD 180642 (V1449 Aql) from CoRoT space-based photometry
• Tidal asteroseismology: Kepler's KOI-54
• The dependence of convective core overshooting on stellar mass: Additional binary systems and improved calibration
• Asteroseismic modelling of the two F-type hybrid pulsators KIC10080943A and KIC10080943B
• The mass discrepancy in intermediate- and high-mass eclipsing binaries: the need for higher convective core masses
• 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
• 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
• Systematic search for stellar pulsators in the eclipsing binaries observed by Kepler
• The TESS light curve of AI Phoenicis
• Discovery of tidally-perturbed pulsations in the eclipsing binary U Gru: a pioneering system for tidal asteroseismology
• Probing the shape of the mixing profile and of the thermal structure at the convective core boundary through asteroseismology
• An instability due to the nonlinear coupling of p-modes to g-modes: Implications for coalescing neutron star binaries
• Period spacings of gravity modes in rapidly rotating magnetic stars I. Axisymmetric fossil field with poloidal and toroidal components
• KIC 11285625: a double-lined spectroscopic binary with a gamma Dor pulsator discovered from Kepler space photometry
• 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
• Asteroseismic inference of the near-core magnetic field strength in the main sequence B star HD 43317
• Discovery of $\beta$ Cep pulsations in the eclipsing binary V453 Cygni
• Variability of newly identified B-type stars observed by Kepler
• The Araucaria Project: High-precision Cepheid astrophysics from the analysis of variables in double-lined eclipsing binaries
• Tidally Induced Pulsations in Kepler Eclipsing Binary KIC 3230227
• Gravity Modes Reveal the Internal Rotation of a Post-mass Transfer Gamma Doradus/Delta Scuti Hybrid Pulsator in Kepler Eclipsing Binary KIC 9592855
• The Eclipsing System V404 Lyr: Light-Travel Times and Gamma Doradus Pulsations
• High-mass pulsators in eclipsing binaries observed using TESS
• Detecting axisymmetric magnetic fields using gravity modes in intermediate-mass stars
• Asteroseismic modeling of gravity modes in slowly rotating A/F stars with radiative levitation
• High-precision asteroseismology in Slowly Pulsating B star: HD 50230
• A beta Cephei pulsator and a changing orbital inclination in the high-mass eclipsing binary system VV Orionis
• A comparison of the dynamical and model-derived parameters of the pulsating eclipsing binary KIC9850387
• Tidally perturbed pulsations in the pre-main sequence $\delta$ Scuti binary RS Cha
• KIC 4150611: a rare multi-eclipsing quintuple with a hybrid pulsator
• CoRoT 105906206: a short-period and totally eclipsing binary with a Delta Scuti type pulsator
• Photometric mode identification methods of nonradial pulsations in eclipsing binaries I. -- Dynamic Eclipse Mapping
• Multi-technique investigation of the binary fraction among A-F type candidate hybrid variable stars discovered by Kepler
• Tango of celestial dancers: A sample of detached eclipsing binary systems containing g-mode pulsating components. A case study of KIC9850387
• Search for exoplanets around pulsating stars of A--F type in Kepler Short Cadence data and the case of KIC 8197761
• The surface brightness - colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
• A Mass-accreting Gamma Doradus Pulsator with a Synchronized Core in Kepler Eclipsing Binary KIC 7385478
• Tidal Asteroseismology: Possible Evidence of Non-linear Mode Coupling in an Equilibrium State in Kepler Eclipsing Binary KIC 3230227
• V456 Cyg: An eclipsing binary with tidally perturbed g-mode pulsations
• $\beta$ Cephei Pulsations in the High-mass Eclipsing System CW Cephei
• Tidally Excited Modes and $\delta$ Scuti Pulsations in the Eclipsing Triple Star IM Persei
• The Kepler IRIS Catalog: Image subtraction light curves for 9,150 stars in and around the open clusters NGC 6791 and NGC 6819
• TESS Photometry of the Eclipsing $\delta$ Scuti Star AI Hydrae
• A new photometric and spectroscopic study of the eclipsing binaries CC Her and CM Lac: Physical parameters and evolutionary status

Cited by in corpus (3)

• Unveiling $\delta$ Scuti and $\gamma$ Doradus Hybrid Pulsation of HD 53166 and HD 53349 Plus Rich Frequencies in HD 52788 -- Catalogs of 70552 $\delta$ Sct and 8080 $\gamma$ Dor
• The Value-Added Catalog of ASAS-SN Eclipsing Binaries II: Properties of Extra-Physics Systems
• TIC 43152097. The first eclipsing binary in NGC 2232