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Solar Variability

Solar Variability. 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 topics

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Solar Variability

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  1. Solar Variability Lead: Arnold Hanslmeier Current research field • Dynamics ofthe solar photosphere, smallscale, large scalefields; solar dynamoaction; smallscalefeaturesand solar dynamo, solar variability on different timescales Current main research topics • Solar 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 IWF/ÖAW

  2. Methodology 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 spectropolarimetry IWF/ÖAW

  3. Open questions within the research field 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 IWF/ÖAW

  4. Proposal for common topics • 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 • KiepenheuerInstitut/AIP; TatranskaLomnica; Pic du Midi; • Networking: Solarnet, Access to VTT/GREGOR, satellite data • Vienna: Inst. Mathematics Waves, disturbances, turbulent processes Over solar cylce IWF/ÖAW

  5. Common borders Relevant research areas Graz • Space weather related studies • Lower chromopshere/corona coupling • Solar like stars • Exoplanets near solar like stars; space weather effects Vienna • solar like stars • Extrasolarsystems Innsbruck • Galactic evolution/dynamics, metal gradients IWF/ÖAW

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