29 citations · 67 across the 5 of their papers we have counts for
4 papers · 1 filter
Evolution of solar surface inflows around emerging active regions
N. Gottschling, H. Schunker, A. C. Birch +2
Solar active regions are associated with Evershed outflows in sunspot penumbrae, moat outflows surrounding sunspots, and extended inflows surrounding active regions. The latter hav…
Average motion of emerging solar active region polarities II: Joy's law
Hannah Schunker, Christian Baumgartner, Aaron C. Birch +3
The tilt of solar active regions described by Joy's law is essential for converting a toroidal field to a poloidal field in Babcock-Leighton dynamo models. In thin flux tube models…
Average motion of emerging solar active region polarities I: Two phases of emergence
Hannah Schunker, Aaron C. Birch, Robert H. Cameron +3
Our goal is to constrain models of active region formation by tracking the average motion of active region polarity pairs as they emerge onto the surface. We measured the motion of…
Measuring stellar rotation periods with Kepler
M. B. Nielsen, L. Gizon, H. Schunker +1
We measure rotation periods for 12151 stars in the Kepler field, based on the photometric variability caused by stellar activity. Our analysis returns stable rotation periods over…