3 papers
astro-ph.SR2021
On the (in)stability of sunspots
Hanna Strecker, Wolfgang Schmidt, Rolf Schlichenmaier +1
The stability of sunspots is one of the long-standing unsolved puzzles in the field of solar magnetism. We study the effects that destabilise and stabilise the flux tube of a simul…
astro-ph.SR2018
Analysis methods of the flow field around decaying sunspots
Hanna Strecker, Nazaret Bello González
The moat flow, a radial outflow surrounding fully fledged sunspots, is a well characterised phenomenon. Nevertheless, its origin and especially its relation to the penumbra is stil…
astro-ph.SR2018
Evolution of the flow field in decaying active regions, Transition from a moat flow to a supergranular flow
Hanna Strecker, Nazaret Bello González
We investigate the evolution of the horizontal flow field around sunspots during their decay by analysing its extension and horizontal velocity around eight spots using SDO/HMI Dop…