FX UMa: A New Heartbeat Binary System with Linear and Non-linear Tidal Oscillations and delta Sct Pulsations

Abstract

We present a detailed analysis of an eclipsing double-lined binary FX UMa based on TESS photometry and newly acquired spectroscopic observations. The radial velocities and atmospheric parameters for each component star are obtained from the SONG high-resolution spectra. Combined with the radial-velocity measurements, our light-curve modeling yields absolute masses and radii of the two components. The Fourier amplitude spectrum of the residual light curve reveals a total of 103 frequencies with signal-to-noise ratio (S/N) > 4, including 12 independent frequencies, 17 multiples of the orbital frequency (Nforb), and 74 combination frequencies. Ten Nforb peaks with S/N > 10 have very high amplitudes and are likely due to tidally excited oscillations (TEOs). The remaining Nforb peaks (4 < S/N < 10) may be originated from the imperfect removal, or they are actually real TEOs. Four anharmonic frequencies can pair up and sum to give exact harmonics of the orbital frequency, suggesting the existence of non-linear tidal processes in the eccentric binary system FX UMa. Eight independent frequencies in the range of 20 to 32 day${}^{-1}$ are typical low-order pressure modes of delta Scuti pulsators.

arXiv comment17 pages, 7 figures, Accepted for publication in AJ

References in corpus (40)

• emcee: The MCMC Hammer
• The Transiting Exoplanet Survey Satellite
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• Accurate masses and radii of normal stars: modern results and applications
• Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
• Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec
• Kepler Eclipsing Binary Stars. VII. The Catalog of Eclipsing Binaries Found in the Entire Kepler Data-Set
• Probing the interior physics of stars through asteroseismology
• Modern stellar spectroscopy caveats
• The Zwicky Transient Facility Catalog of Periodic Variable Stars
• emcee v3: A Python ensemble sampling toolkit for affine-invariant MCMC
• Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
• Testing the asteroseismic scaling relations for Red Giants with Eclipsing Binaries Observed by Kepler
• Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties
• KIC 4544587: an Eccentric, Short Period Binary System with delta Sct Pulsations and Tidally Excited Modes
• Nonlinear Tides in Close Binary Systems
• Tidal asteroseismology: Kepler's KOI-54
• Asteroseismic modelling of the two F-type hybrid pulsators KIC10080943A and KIC10080943B
• First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her
• Tidally Trapped Pulsations in a close binary star system discovered by TESS
• Systematic search for stellar pulsators in the eclipsing binaries observed by Kepler
• Two white dwarfs in ultrashort binaries with detached, eclipsing, likely substellar companions detected by K2
• Discovery of tidally-perturbed pulsations in the eclipsing binary U Gru: a pioneering system for tidal asteroseismology
• 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
• KIC 9246715: The Double Red Giant Eclipsing Binary With Odd Oscillations
• Hot subdwarf Atmospheric parameters, Kinematics, and Origins -- Based on 1587 hot subdwarf stars observed in Gaia DR2 and LAMOST DR7
• Gravity Modes Reveal the Internal Rotation of a Post-mass Transfer Gamma Doradus/Delta Scuti Hybrid Pulsator in Kepler Eclipsing Binary KIC 9592855
• Spectroscopic and seismic analysis of red giants in eclipsing binaries discovered by Kepler
• Nonlinear dynamical tides in white dwarf binaries
• Conducting the SONG: The robotic nature and efficiency of a fully automated telescope
• Extremely low-mass white dwarf stars observed in Gaia DR2 and LAMOST DR8
• Eclipsing Systems with Pulsating Components (Types β Cep, δ Sct, γ Dor or Red Giant) in the Era of High-Accuracy Space Data
• A search for variable subdwarf B stars in TESS Full Frame Images II. Variable objects in the northern ecliptic hemisphere
• Tidal Asteroseismology: Possible Evidence of Non-linear Mode Coupling in an Equilibrium State in Kepler Eclipsing Binary KIC 3230227
• A fast and portable Re-Implementation of Piskunov and Valenti's Optimal-Extraction Algorithm with improved Cosmic-Ray Removal and Optimal Sky Subtraction
• APOGEE/Kepler Overlap Yields Orbital Solutions for a Variety of Eclipsing Binaries
• Physical Properties of 29 sdB+dM Eclipsing Binaries in Zwicky Transient Facility
• TYC~2990-127-1: an Algol-type SB2 binary system of subgiant and red giant with a probable ongoing mass-transfer
• OO Dra: an Algol-type binary formed through an extremely helium-poor mass accretion revealed by asteroseismology

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