Differential rotation in main-sequence solar-like stars: Qualitative inference from asteroseismic data

Abstract

Understanding differential rotation of Sun-like stars is of great importance for insight into the angular momentum transport in these stars. One means of gaining such information is that of asteroseismology. By a forward modeling approach we analyze in a qualitative manner the impact of different differential rotation profiles on the splittings of p-mode oscillation frequencies. The optimum modes for inference on differential rotation are identified along with the best value of the stellar inclination angle. We find that in general it is not likely that asteroseismology can be used to make an unambiguous distinction between a rotation profile such as, e.g., a conical Sun-like profile and a cylindrical profile. In addition, it seems unlikely that asteroseismology of Sun-like stars will result in inferences on the radial profile of the differential rotation, such as can be done for, e.g., red giants. At best one could possibly obtain the sign of the radial differential rotation gradient. Measurements of the extent of the latitudinal differential from frequency splitting are, however, more promising. One very interesting aspect that could likely be tested from frequency splittings is whether the differential rotation is solar-like or anti-solar-like in nature, in the sense that a solar-like profile has an equator rotating faster than the poles.

30 pages, 21 figures, Published in The Astrophysical Journal (Figures 3 and 4 have been changed relative to the published version)

References in corpus (25)

• Rotation Periods of 34,030 Kepler Main-Sequence Stars: The Full Autocorrelation Sample
• Global-Scale Turbulent Convection and Magnetic Dynamo Action in the Solar Envelope
• Measuring the rotation period distribution of field M-dwarfs with Kepler
• ADIPLS -- the Aarhus adiabatic oscillation package
• Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants
• Simulations of dynamo action in fully convective stars
• Angular momentum transport within evolved low-mass stars
• ASTEC -- the Aarhus STellar Evolution Code
• CoRoT reveals a magnetic activity cycle in a Sun-like star
• Solar differential rotation and meridional flow: The role of a subadiabatic tachocline for the Taylor-Proudman balance
• Structure and Evolution of Giant Cells in Global Models of Solar Convection
• Asteroseismology of the solar analogs 16 Cyg A & B from Kepler observations
• Acoustic oscillations of rapidly rotating polytropic stars. II. Effects of the Coriolis and centrifugal accelerations
• A multi-site campaign to measure solar-like oscillations in Procyon. I. Observations, Data Reduction and Slow Variations
• Rapidly Rotating Suns and Active Nests of Convection
• Acoustic oscillations in rapidly rotating polytropic stars I. Effects of the centrifugal distortion
• Intrinsic photometric characterisation of stellar oscillations and granulation. Solar reference values and CoRoT response functions
• What asteroseismology can do for exoplanets: Kepler-410A b is a Small Neptune around a bright star, in an eccentric orbit consistent with low obliquity
• Reynolds stress and heat flux in spherical shell convection
• Measuring stellar differential rotation with high-precision space-borne photometry
• On deriving p-mode parameters for inclined solar-like stars
• Meridional Circulation and Global Solar Oscillations
• Stellar Oscillations Network Group
• Current methods for analyzing light curves of solar-like stars
• A framework for describing correlated excitation of solar p modes

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• Global Seismology of the Sun
• Nearly-uniform internal rotation of solar-like main-sequence stars revealed by space-based asteroseismology and spectroscopic measurements
• Asteroseismic inference on rotation, gyrochronology and planetary system dynamics of 16 Cygni
• Rotation periods and seismic ages of KOIs - comparison with stars without detected planets from Kepler observations
• Weakened magnetic braking supported by asteroseismic rotation rates of Kepler dwarfs
• Constraining the efficiency of angular momentum transport with asteroseismology of red giants: the effect of stellar mass
• The influence of metallicity on stellar differential rotation and magnetic activity
• Spin-orbit alignment of exoplanet systems: ensemble analysis using asteroseismology
• Stellar Activity and Coronal Heating: an overview of recent results
• Constraining differential rotation of Sun-like stars from asteroseismic and starspot rotation periods
• Sun-Like Magnetic Cycles in the Rapidly-Rotating Young Solar Analog HD 30495
• A method to discriminate solar and antisolar differential rotation in high-precision light curves
• Limits on radial differential rotation in Sun-like stars from parametric fits to oscillation power spectra
• Kepler-93: a testbed for detailed seismic modelling and orbital evolution of super-earths around solar-like stars
• Observing dynamos in cool stars
• The two-dimensional internal rotation of KIC11145123
• Asteroseismic inversions for radial differential rotation of Sun-like stars: ensemble fits
• Seismic Solar Models from Ledoux discriminant inversions
• Measuring frequency and period separations in red-giant stars using machine learning
• Low-latitude magnetic flux emergence on rapidly rotating solar-type stars
• Asteroseismology with PBjam 2.0: measuring dipole mode frequencies in coupling regimes from main sequence to low-luminosity red giant stars
• Spatial incoherence of solar granulation: a global analysis using BiSON 2B data
• Stellar oscillations - the adiabatic case
• Anti-Solar Differential Rotation May Have Revived Magnetic Braking in the Subgiant 31 Aquilae