Asteroseismology of evolved stars to constrain the internal transport of angular momentum. VI. Testing a parametric formulation for the azimuthal magneto-rotational instability

Abstract

Asteroseismic measurements of the internal rotation rate in evolved stars pointed out to a lack of angular momentum (AM) transport in stellar evolution models. Several physical processes in addition to hydrodynamical ones were proposed as candidates for the missing mechanism. Nonetheless, no current candidate can satisfy all the constraints provided by asteroseismology. We revisit the role of a candidate process whose efficiency scales with the contrast between the rotation rate of the core and the surface which was proposed to be related to the azimuthal magneto-rotational instability (AMRI) by Spada et al. We compute stellar evolution models of low- and intermediate-mass stars with the parametric formulation of AM transport proposed by Spada et al. until the end of the core-helium burning for low- and intermediate-mass stars and compare our results to the latest asteroseismic constraints available in the post main sequence phase. Both hydrogen-shell burning stars in the red giant branch and core-helium burning stars of low- and intermediate-mass in the mass range $1M_{\odot }\lesssim M\lesssim 2.5M_{\odot }$ can be simultaneously reproduced by this kind of parametrisation. Given current constraints from asteroseismology, the core rotation rate of post-main sequence stars seems to be well explained by a process whose efficiency is regulated by the internal degree of differential rotation in radiative zones.

Accepted for publication in Astronomy & Astrophysics. 10 pages, 10 figures, 1 appendix

References in corpus (27)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• Slowing the Spins of Stellar Cores
• The interior rotation of a sample of gamma Doradus stars from ensemble modelling of their gravity mode period spacings
• White Dwarf Rotation as a Function of Mass and a Dichotomy of Mode Linewidths: Kepler Observations of 27 Pulsating DA White Dwarfs Through K2 Campaign 8
• General Cosmography Model with Spatial Curvature
• Diagnoses to unravel secular hydrodynamical processes in rotating main sequence stars
• Constraining the efficiency of angular momentum transport with asteroseismology of red giants: the effect of stellar mass
• Angular momentum redistribution by mixed modes in evolved low-mass stars. II. Spin-down of the core of red giants induced by mixed modes
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum II. Test of a revised prescription for transport by the Tayler instability
• Can plume-induced internal gravity waves regulate the core rotation of subgiant stars?
• Rotation of the convective core in $\gamma$ Dor stars measured by dips in period spacings of g modes coupled with inertial modes
• Theoretical power spectra of mixed modes in low mass red giant stars
• Seismic evidence for near solid-body rotation in two Kepler subgiants and implications for angular momentum transport
• Modeling of Magneto-Rotational Stellar Evolution I. Method and first applications
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum. I. Efficiency of transport during the subgiant phase
• The Role of the Magnetorotational Instability in Massive Stars
• The angular momentum transport by unstable toroidal magnetic fields
• Rotation in stellar interiors: General formulation and an asteroseismic-calibrated transport by the Tayler instability
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum. III. Using the rotation rates of intermediate-mass stars to test the Fuller-formalism
• Constraining transport of angular momentum in stars: Combining asteroseismic observations of core helium burning stars and white dwarfs
• Core-Envelope Coupling in Intermediate-Mass Core-Helium Burning Stars
• The magneto-rotational instability in massive stars
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum. IV. Internal rotation of Kepler 56 from an MCMC analysis of the rotational splittings
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum. V. Efficiency of the transport on the red giant branch and in the red clump
• Backtracing the internal rotation history of the $\beta$ Cep star HD 129929
• Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?

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