A model of rotating convection in stellar and planetary interiors: II -- gravito-inertial wave generation

Abstract

Gravito-inertial waves are excited at the interface of convective and radiative regions and by the Reynolds stresses in the bulk of the convection zones of rotating stars and planets. Such waves have notable asteroseismic signatures in the frequency spectra of rotating stars, particularly among rapidly rotating early-type stars, which provides a means of probing their internal structure and dynamics. They can also transport angular momentum, chemical species, and energy from the excitation region to where they dissipate in radiative regions. To estimate the excitation and convective parameter dependence of the amplitude of those waves, a monomodal model for stellar and planetary convection as described in Paper I is employed, which provides the magnitude of the rms convective velocity as a function of rotation rate. With this convection model, two channels for wave driving are considered: excitation at a boundary between convectively stable and unstable regions and excitation due to Reynolds-stresses. Parameter regimes are found where the sub-inertial waves may carry a significant energy flux, depending upon the convective Rossby number, the interface stiffness, and the wave frequency. The super-inertial waves can also be enhanced, but only for convective Rossby numbers near unity. Interfacially excited waves have a peak energy flux near the lower cutoff frequency when the convective Rossby number of the flows that excite them are below a critical Rossby number that depends upon the stiffness of the interface, whereas that flux decreases when the convective Rossby number is larger than this critical Rossby number.

arXiv comment18 pages, 6 figures, accepted in ApJ

References in corpus (66)

• The evolution of rotating stars
• Fast core rotation in red-giant stars revealed by gravity-dominated mixed modes
• Cascades and transitions in turbulent flows
• Seismic evidence for a rapidly rotating core in a lower-giant-branch star observed with Kepler
• Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants
• Angular Momentum Transport in Stellar Interiors
• Internal Gravity Waves in Massive Stars: Angular Momentum Transport
• Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler
• Asteroseismic measurement of surface-to-core rotation in a main sequence A star, KIC 11145123
• Pre-Supernova Outbursts via Wave Heating in Massive Stars I: Red Supergiants
• Improved angular momentum evolution model for solar-like stars II. Exploring the mass dependence
• Hydrodynamical stellar models including rotation, internal gravity waves and atomic diffusion. I. Formalism and tests on Pop I dwarfs
• The interior rotation of a sample of gamma Doradus stars from ensemble modelling of their gravity mode period spacings
• Asteroseismic measurement of slow, nearly-uniform surface-to-core rotation in the main sequence F star KIC 9244992
• Sub-Inertial Gravity Modes in the B8V Star KIC 7760680 Reveal Moderate Core Overshooting and Low Vertical Diffusive Mixing
• Core rotation braking on the red giant branch for various mass ranges
• Rotational mixing in low-mass stars : I Effect of the mu-gradients in main sequence and subgiant Pop I stars
• Simulations of core convection in rotating A-type stars: Differential rotation and overshooting
• On differential rotation and overshooting in solar-like stars
• First grids of low-mass stellar models and isochrones with self-consistent treatment of rotation : From 0.2 to 1.5 M_\odot at 7 metallicities from PMS to TAMS
• Excitation of stellar p-modes by turbulent convection: 1. Theoretical formulation
• A new asteroseismic diagnostic for internal rotation in $\gamma$ Doradus stars
• Rotating models of young solar-type stars : Exploring braking laws and angular momentum transport processes
• Diagnoses to unravel secular hydrodynamical processes in rotating main sequence stars
• On the sensitivity of gravito-inertial modes to differential rotation in intermediate-mass main-sequence stars
• Nearly-uniform internal rotation of solar-like main-sequence stars revealed by space-based asteroseismology and spectroscopic measurements
• Asymptotic g modes: Evidence for a rapid rotation of the solar core
• Internal Gravity Wave Excitation by Turbulent Convection
• Pre-Supernova Outbursts via Wave Heating in Massive Stars II: Hydrogen-poor Stars
• Three-Dimensional Simulations of Massive Stars: I. Wave Generation and Propagation
• On the Chemical Mixing Induced by Internal Gravity Waves (IGW)
• The Magnetic Furnace: Intense Core Dynamos in B-stars
• Stochastic excitation of nonradial modes II. Are solar asymptotic gravity modes detectable?
• On the Differential Rotation of Massive Main Sequence Stars
• Theoretical values of convective turnover times and Rossby numbers for solar-like, pre-main sequence stars
• Gravity Waves in the Sun
• The interior angular momentum of core hydrogen burning stars from gravity-mode oscillations
• Theoretical seismology in 3D : nonlinear simulations of internal gravity waves in solar-like stars
• Numerical Simulations of Penetration and Overshoot in the Sun
• Angular momentum transport efficiency in post-main sequence low-mass stars
• Theory and simulations of rotating convection
• The Observational Signatures of Convectively Excited Internal Gravity Modes in Main Sequence Stars
• Gravity-mode period spacings and near-core rotation rates of 611 $\gamma$ Doradus stars with \textit{Kepler}
• Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars
• Anisotropy and non-universality in scaling laws of the large scale energy spectrum in rotating turbulence
• Deciphering the oscillation spectrum of $\gamma$ Doradus and SPB stars
• Generation of internal gravity waves by penetrative convection
• Quantification of the strength of inertial waves in a rotating turbulent flow
• Impact of rotation on stochastic excitation of gravity and gravito-inertial waves in stars
• Impact of internal gravity waves on the rotation profile inside pre-main sequence low-mass stars
• Extreme value statistics for two-dimensional convective penetration in a pre-Main Sequence star
• A model of rotating convection in stellar and planetary interiors: I - convective penetration
• Characterizing the propagation of gravity waves in 3D nonlinear simulations of solar-like stars
• The magnetic strip(s) in the advanced phases of stellar evolution - Theoretical convective turnover timescale and Rossby number for low- and intermediate-mass stars up to the AGB at various metallicities
• The coupling between internal waves and shear-induced turbulence in stellar radiation zones: the critical layer
• The impact of rotation on turbulent tidal friction in stellar and planetary convective regions
• Asymptotic theory of gravity modes in rotating stars. I. Ray dynamics
• Origin and evolution of magnetic fields in PMS stars : influence of rotation and structural changes
• The energy flux spectrum of internal waves generated by turbulent convection
• Stellar oscillations. II The non-adiabatic case
• Angular momentum transport by stochastically excited oscillations in rapidly rotating massive stars
• Mode excitation by turbulent convection in rotating stars. I. Effect of uniform rotation
• Jupiter's Mesoscale Waves Observed at 5 $\mu$m by Ground-Based Observations and Juno JIRAM
• Combined asteroseismology, spectroscopy, and astrometry of the CoRoT B2V target HD 170580
• A study of turbulence and interacting inertial modes in a differentially-rotating spherical shell experiment
• Extreme-value statistics from Lagrangian convex hull analysis for homogeneous turbulent Boussinesq convection and MHD convection

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