IWF/ÖAW

Lead: Arnold Hanslmeier

Current research field Dynamics of the solar photosphere, small

scale, large scale fields; solar dynamo action; small scale features and solar dynamo, solar variability on different timescales

Current main research topicsSolar variability

Convective energy transport on different time scales

Convective dynamics and relation photospheric/chromospheric dynamics

Long term solar variability/space weather and space climate effects

Current personel• 1 post doc, 2 doctorands, 3 master thesis

Solar Variability

1

IWF/ÖAW

Data analysis of high resolution solar observations

Ground based observatory data from VTT GREGOR Future telescopes ATST, EST

Space missions Hinode SDO SUNRISE Upcoming missions

High resolution observations Implication for Sun as a star Comparison with HD, MHD high resolution

models

Methodology

2

spectropolarimetry

IWF/ÖAW

Questions to be solved

What is the variation of solar convective dynamics over solar activity cycle

What is the contribution of convective energy transport to solar irradiance variations

What is the connection of small scale processes with turbulent waves and transport of magnetic flux in the photosphere/lower chromosphere

How can these processes be deduced from models

What are the implications for solar like stars, space weather and space climate

Open questions within the research field

3

IWF/ÖAW

use the Sun as prototype for stars to study Excitation Propagation

Variation of parameters such as Velocity fields Temperature fields Pressure gradients Instabilities

Implications for near-Sun environment Space weather Space climate What can be expected for planets

Ongoing cooperation Kiepenheuer Institut/AIP; Tatranska Lomnica; Pic du Midi; Networking: Solarnet, Access to VTT/GREGOR, satellite data Vienna: Inst. Mathematics

Proposal for common topics

4

Waves, disturbances, turbulent processes

Over solar cylce

IWF/ÖAW

Relevant research areas

Graz Space weather related studies Lower chromopshere/corona coupling Solar like stars Exoplanets near solar like stars; space weather effects

Common borders

5

Vienna solar like stars Extrasolar systems

Innsbruck Galactic evolution/dynamics, metal gradients