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Stellar Granulation as the Source of High-Frequency Flicker in Kepler Light Curves
Steven R. Cranmer, Fabienne A. Bastien, Keivan G. Stassun +1
A large fraction of cool, low-mass stars exhibit brightness fluctuations that arise from a combination of convective granulation, acoustic oscillations, magnetic activity, and stel…
The Spatial and Temporal Dependence of Coronal Heating by Alfven Wave Turbulence
M. Asgari-Targhi, A. A. van Ballegooijen, S. R. Cranmer +1
The solar atmosphere may be heated by Alfven waves that propagate up from the convection zone and dissipate their energy in the chromosphere and corona. To further test this theory…
Constraining a Model of Turbulent Coronal Heating for AU Microscopii with X-Ray, Radio, and Millimeter Observations
Steven R. Cranmer, David J. Wilner, Meredith A. MacGregor
Many low-mass pre-main-sequence stars exhibit strong magnetic activity and coronal X-ray emission. Even after the primordial accretion disk has been cleared out, the star's high-en…
Connecting the Sun's High-Resolution Magnetic Carpet to the Turbulent Heliosphere
Steven R. Cranmer, Adriaan A. van Ballegooijen, Lauren N. Woolsey
The solar wind is connected to the Sun's atmosphere by flux tubes that are rooted in an ever-changing pattern of positive and negative magnetic polarities on the surface. Observati…