Determining stellar macroturbulence using asteroseismic rotational velocities from Kepler
Determining stellar macroturbulence using asteroseismic rotational velocities from Kepler
The Rossiter-McLaughlin effect observed for transiting exoplanets often requires prior knowledge of the stellar projected equatorial rotational velocity. This is usually provided by measuring the broadening of spectral lines, however this method has uncertainties as lines are also broadened by velocity fields in the stellar photosphere known as macroturbulence. We …