Variability of newly identified B-type stars observed by Kepler

Abstract

Recent re-determination of stellar atmospheric parameters for a sample of stars observed during the {\it Kepler} mission allowed to enlarge the number of {\it Kepler} B-type stars. We present the detailed frequency analysis for all these objects. All stars exhibit pulsational variability with maximum amplitudes at frequencies corresponding to high-order g modes. Peaks that could be identified with low-order p/g modes are also extracted for a few stars. We identified some patters in the oscillation spectra that can be associated with the period spacings that can result from the asymptotic nature of the detected pulsational modes. We also tentatively confront the observed oscillation characteristics with predictions from linear nonadiabatic computations of stellar pulsations. For high-order g modes the traditional approximation was employed to include the effects of rotation on the frequency values and mode instability.

Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal

References in corpus (23)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• Updated Electron-Conduction Opacities: The Impact on Low-Mass Stellar Models
• Present-day cosmic abundances. A comprehensive study of nearby early B-type stars and implications for stellar and Galactic evolution and interstellar dust models
• Coulomb tunneling for fusion reactions in dense matter: Path integral Monte Carlo versus mean field
• Low-frequency gravity waves in blue supergiants revealed by high-precision space photometry
• Signatures of internal rotation discovered in the Kepler data of five slowly pulsating B stars
• 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
• Photometric detection of internal gravity waves in upper main-sequence stars. II. Combined TESS photometry and high-resolution spectroscopy
• Open Clusters as Galactic Disk Tracers: I. Project Motivation, Cluster Membership and Bulk Three-Dimensional Kinematics
• Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample
• KIC 10526294: a slowly rotating B star with rotationally split, quasi-equally spaced gravity modes
• Fully compressible simulations of waves and core convection in main-sequence stars
• Rotational modulation in TESS B stars
• The Classificiation of Kepler B star Variables
• Low-frequency variability in massive stars: Core generation or surface phenomenon?
• Interpretation of the BRITE oscillation data of the hybrid pulsator $\nu$ Eridani: a call for the modification of stellar opacities
• Excitation and visibility of slow modes in rotating B-type stars
• Two-Dimensional Simulations of Internal Gravity Waves in The Radiation Zones of Intermediate-Mass Stars
• Seismic modelling of early B-type pulsators observed by BRITE: I. $\theta$ Ophiuchi
• Stellar Parameters for Pulsating B Star Candidates in the Kepler Field
• Interpretation of the BRITE oscillation spectra of the early B-type stars: $\nu$ Eri and $\alpha$ Lup

Cited by in corpus (23)

• Gaia Data Release 3: Pulsations in main sequence OBAF-type stars
• An all-sky sample of intermediate- to high-mass OBA-type eclipsing binaries observed by TESS
• Internal rotation and inclinations of slowly pulsating B stars: Evidence of interior angular momentum transport
• The photometric variability of massive stars due to gravity waves excited by core convection
• Seismic modeling of a very young SPB star -- KIC8264293
• Internal rotation and buoyancy travel time of 60 gamma Doradus stars from uninterrupted TESS light curves spanning 352 days
• Pulsating B stars in the Scorpius-Centaurus Association with TESS
• Tidally perturbed g-mode pulsations in a sample of close eclipsing binaries
• Four bright eclipsing binaries with gamma Doradus pulsating components: CM Lac, MZ Lac, RX Dra and V2077 Cyg
• Multiscale entropy analysis of astronomical time series. Discovering subclusters of hybrid pulsators
• Two-dimensional simulations of internal gravity waves in a 5 $M_{\odot }$ Zero-Age-Main-Sequence model
• Stochastic excitation of internal gravity waves in rotating late F-type stars: A 3D simulation approach
• Asteroseismology of $\beta$ Cephei stars: The stellar inferences tested in hare and hound exercises
• Analysis of high-resolution FEROS spectroscopy for a sample of variable B-type stars assembled from TESS photometry
• V456 Cyg: An eclipsing binary with tidally perturbed g-mode pulsations
• The ESO UVES/FEROS Large Programs of TESS OB pulsators. I. Global stellar parameters from high-resolution spectroscopy
• The near-core rotation of HD 112429: a gamma Doradus star with TESS photometry and legacy spectroscopy
• Effect of Rotation on Wave Mixing in Intermediate Mass Stars
• Mode coupling coefficients between the convective core and radiative envelope of $\gamma$Doradus and slowly pulsating B stars
• Fast time optical variability in Be/X-ray binaries. Pulsation and rotation
• Non-linear Three-mode Coupling of Gravity Modes in Rotating Slowly Pulsating B Stars: Stationary Solutions and Modeling Potential
• On the Geometry of the Near-Core Magnetic Field in Massive Stars
• Asteroseismology