Photometric detection of internal gravity waves in upper main-sequence stars. II. Combined TESS photometry and high-resolution spectroscopy

Abstract

Context. Massive stars are predicted to excite internal gravity waves (IGWs) by turbulent core convection and from turbulent pressure fluctuations in their near-surface layers. These IGWs are extremely efficient at transporting angular momentum and chemical species within stellar interiors, but they remain largely unconstrained observationally. Aims. We aim to characterise the photometric detection of IGWs across a large number of O and early-B stars in the Hertzsprung-Russell diagram, and explain the ubiquitous detection of stochastic variability in the photospheres of massive stars. Methods. We combined high-precision time-series photometry from the NASA Transiting Exoplanet Survey Satellite with high-resolution ground-based spectroscopy of 70 stars with spectral types O and B to probe the relationship between the photometric signatures of IGWs and parameters such as spectroscopic mass, luminosity, and macroturbulence. Results. A relationship is found between the location of a star in the spectroscopic Hertzsprung-Russell diagram and the amplitudes and frequencies of stochastic photometric variability in the light curves of massive stars. Furthermore, the properties of the stochastic variability are statistically correlated with macroturbulent velocity broadening in the spectral lines of massive stars. Conclusions. The common ensemble morphology for the stochastic low-frequency variability detected in space photometry and its relationship to macroturbulence is strong evidence for IGWs in massive stars, since these types of waves are unique in providing the dominant tangential velocity field required to explain the observed spectroscopy.

arXiv commentAccepted for publication in A&A. 10 pages and 5 figures (and an additional 7 pages of appendix tables and figures). Resolution of appendix figures have been downgraded to meet arXiv's maximum file size of 15Mb. This version (2ver) is post A&A language editing

References in corpus (77)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• The Transiting Exoplanet Survey Satellite
• Binary interaction dominates the evolution of massive stars
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
• The K2 Mission: Characterization and Early results
• Kepler Mission Design, Realized Photometric Performance, and Early Science
• Pre-Supernova Evolution of Massive Single and Binary Stars
• The CoRoT satellite in flight : description and performance
• HERMES: a high-resolution fibre-fed spectrograph for the Mercator telescope
• Galactic Reddening in 3D from Stellar Photometry - An Improved Map
• Grids of stellar models with rotation - III. Models from 0.8 to 120 Msun at a metallicity Z = 0.002
• Sub-surface convection zones in hot massive stars and their observable consequences
• The IACOB project: I. Rotational velocities in Northern Galactic O and early B-type stars revisited. The impact of other sources of line-broadening
• Angular Momentum Transport in Stellar Interiors
• Internal Gravity Waves in Massive Stars: Angular Momentum Transport
• Tight asteroseismic constraints on core overshooting and diffusive mixing in the slowly rotating pulsating B8.3V star KIC 10526294
• Sub-Inertial Gravity Modes in the B8V Star KIC 7760680 Reveal Moderate Core Overshooting and Low Vertical Diffusive Mixing
• Low-frequency gravity waves in blue supergiants revealed by high-precision space photometry
• The spectroscopic Hertzsprung-Russell diagram
• The IACOB project: III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars
• An asteroseismic study of the beta Cephei star theta Ophiuchi: constraints on global stellar parameters and core overshooting
• Magnetic spots on hot massive stars
• Most Detects G- and P-Modes in the B Supergiant HD 163899 (B2Ib/II)
• Evidence for nonlinear resonant mode coupling in the Beta Cep star HD 180642 (V1449 Aql) from CoRoT space-based photometry
• Collective pulsational velocity broadening due to gravity modes as a physical explanation for macroturbulence in hot massive stars
• Gravito-inertial and pressure modes detected in the B3 IV CoRoT target HD 43317
• Internal Gravity Wave Excitation by Turbulent Convection
• Instability strips of SPB and beta Cephei stars: the effect of the updated OP opacities and of the metal mixture
• Variability of OB stars from TESS southern Sectors 1-13 and high-resolution IACOB and OWN spectroscopy
• Variability in the CoRoT photometry of three hot O-type stars. HD 46223, HD 46150 and HD 46966
• Three-Dimensional Simulations of Massive Stars: I. Wave Generation and Propagation
• Grids of stellar models with rotation IV. Models from 1.7 to 120 Msun at a metallicity Z = 0.0004
• Asteroseismic modelling of the two F-type hybrid pulsators KIC10080943A and KIC10080943B
• Asteroseismology of the Beta Cephei star 12 (DD) Lacertae: photometric observations, pulsational frequency analysis and mode identification
• On the Chemical Mixing Induced by Internal Gravity Waves (IGW)
• The IACOB project. V. Spectroscopic parameters of the O-type stars in the modern grid of standards for spectral classification
• The mass discrepancy in intermediate- and high-mass eclipsing binaries: the need for higher convective core masses
• Asteroseismic masses, ages, and core properties of $\gamma$ Doradus stars using gravito-inertial dipole modes and spectroscopy
• On the photometric detection of Internal Gravity Waves in upper main-sequence stars I. Methodology and application to CoRoT targets
• Observational evidence for a correlation between macroturbulent broadening and line-profile variations in OB Supergiants
• On the Differential Rotation of Massive Main Sequence Stars
• 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
• Forward seismic modelling of the pulsating magnetic B-type star HD 43317
• Detecting non-uniform period spacings in the Kepler photometry of gamma Doradus stars: methodology and case studies
• The dependence of convective core overshooting on stellar mass: reality check, and additional evidence
• An asteroseismic study of the O9V star HD 46202 from CoRoT space-based photometry
• Envelope Convection, Surface Magnetism and Spots in A- and late B-type Stars
• KIC 3240411 - the hottest known SPB star with the asymptotic g-mode period spacing
• The Observational Signatures of Convectively Excited Internal Gravity Modes in Main Sequence Stars
• The effects of surface fossil magnetic fields on massive star evolution: I. Magnetic field evolution, mass-loss quenching and magnetic braking
• Eclipsing Binaries as Astrophysical Laboratories: Internal Structure, Convective Core Overshooting and Evolution of the B-star Components of V380 Cygni
• Fully compressible simulations of waves and core convection in main-sequence stars
• Domains of pulsational instability of low-frequency modes in rotating upper main-sequence stars
• The effects of surface fossil magnetic fields on massive star evolution: II. Implementation of magnetic braking in MESA and implications for the evolution of surface rotation in OB stars
• On magnetic inhibition of photospheric macro-turbulence generated in the iron-bump opacity zone of O-stars
• Observational consequences of turbulent pressure in the envelopes of massive stars
• Detection of frequency spacings in the young O-type binary HD 46149 from CoRoT photometry
• Low-frequency variability in massive stars: Core generation or surface phenomenon?
• K2 photometry and HERMES spectroscopy of the blue supergiant rho Leo: rotational wind modulation and low-frequency waves
• The IACOB project. VI. On the elusive detection of massive O-type stars close to the ZAMS
• The spectroscopic Hertzsprung-Russell diagram of hot massive stars in the SMC
• A model of rotating convection in stellar and planetary interiors: I - convective penetration
• Kepler's first view of O-star variability: K2 data of five O stars in Campaign 0 as a proof-of-concept for O-star asteroseismology
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• Low-frequency photospheric and wind variability in the early-B supergiant HD 2905
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• Light variations due to the line-driven wind instability and wind blanketing in O stars
• Investigating the origin of cyclical wind variability in hot, massive stars - II. Hydrodynamical simulations of co-rotating interaction regions using realistic spot parameters for the O giant $\xi$ Persei
• The $\beta$ Cep/SPB star 12 Lacertae: extended mode identification and complex seismic modelling
• A BRITE view on the massive O-type supergiant V973 Scorpii: Hints towards internal gravity waves or subsurface convection zones
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• High-precision CoRoT space photometry and fundamental parameter determination of the B2.5V star HD 48977

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