Constraining differential rotation of Sun-like stars from asteroseismic and starspot rotation periods

Abstract

In previous work we identified six Sun-like stars observed by Kepler with exceptionally clear asteroseismic signatures of rotation. Here, we show that five of these stars exhibit surface variability suitable for measuring rotation. In order to further constrain differential rotation, we compare the rotation periods obtained from light-curve variability with those from asteroseismology. The two rotation measurement methods are found to agree within uncertainties, suggesting that radial differential rotation is weak, as is the case for the Sun. Furthermore, we find significant discrepancies between ages from asteroseismology and from three different gyrochronology relations, implying that stellar age estimation is problematic even for Sun-like stars.

Accepted for publication in A&A. 5 pages, 4 figures

References in corpus (10)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
• ADIPLS -- the Aarhus adiabatic oscillation package
• A spin-down clock for cool stars from observations of a 2.5-billion-year-old cluster
• Asteroseismic measurement of surface-to-core rotation in a main sequence A star, KIC 11145123
• A new correction of stellar oscillation frequencies for near-surface effects
• Asteroseismology for "à la carte" stellar age-dating and weighing: Age and mass of the CoRoT exoplanet host HD 52265
• Rotation periods and ages of solar analogs and solar twins revealed by the Kepler Mission
• The Age and Interior Rotation of Stars from Asteroseismology
• Rotational splitting as a function of mode frequency for six Sun-like stars

Cited by in corpus (26)

• Asteroseismology of solar-type stars
• Stellar Evidence that the Solar Dynamo may be in Transition
• Activity indicators and stellar parameters of the Kepler targets. An application of the ROTFIT pipeline to LAMOST-Kepler stellar spectra
• Weakened magnetic braking supported by asteroseismic rotation rates of Kepler dwarfs
• Rotation periods and seismic ages of KOIs - comparison with stars without detected planets from Kepler observations
• Forward Modeling of the Kepler Stellar Rotation Period Distribution: Interpreting Periods from Mixed and Biased Stellar Populations
• Constraining the efficiency of angular momentum transport with asteroseismology of red giants: the effect of stellar mass
• Seismic evidence for near solid-body rotation in two Kepler subgiants and implications for angular momentum transport
• Asteroseismic measurement of core and envelope rotation rates for 2006 red giant branch stars
• Five young $\delta$ Scuti stars in the Pleiades seen with Kepler/K2
• Probing core overshooting using subgiant asteroseismology: the case of KIC10273246
• Calibration of Differential Light Curves for Physical Analysis of Starspots
• A synthetic sample of short-cadence solar-like oscillators for TESS
• Limits on radial differential rotation in Sun-like stars from parametric fits to oscillation power spectra
• Fundamental properties of Kepler and CoRoT targets -- IV. Masses and radii from frequencies of minimum $\Delta \nu$ and their implications
• The influence of planetary engulfment on stellar rotation in metal-poor main-sequence stars
• Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
• Characterization of Kepler targets based on medium-resolution LAMOST spectra analyzed with ROTFIT
• Asteroseismic inversions for radial differential rotation of Sun-like stars: ensemble fits
• The Direct Effect of Toroidal Magnetic Fields on Stellar Oscillations: An Analytical Expression for the General Matrix Element
• Star-planet interactions VI. Tides, stellar activity and planet evaporation
• Meta-analysis of photometric and asteroseismic measurements of stellar rotation periods: the Lomb-Scargle periodogram, autocorrelation function, wavelet and rotational splitting analysis for 92 Kepler asteroseismic targets
• Is planetary inward migration responsible for GJ 504's fast rotation and bright X-ray luminosity? New constraints from eROSITA
• The stellar activity-rotation-age relationship under the lens of asteroseismology
• The γ Dor stars as revealed by Kepler : A key to reveal deep-layer rotation in A and F stars
• Stellar dynamics of low mass stars from the surface to the interior measured by CoRoT and Kepler