Global properties of the Sun's magnetic field
- Axel Brandenburg (Nordita)
Karel Schrijver (Lockheed Martin Advanced Technology Center)
3/9/15, 9:00 AM
The large-scale magnetic field of the Sun is shaped by the interplay of active-region emergence, random-walk dispersal in supergranulation, and advective transport in the meridional flow and differential rotation. In that process, active region nests, the plage state, and flow-field interactions are important to the formation and evolution of active regions, and likely to the global...
Judit Muraközy (Heliophysical Observatory of Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences)
3/9/15, 9:40 AM
There are different mechanisms affecting the formation of sunspot groups e.g. buoyancy on the emerging flux ropes, drag force, tension, etc. To check the roles of these theoretical mechanisms one needs to study the evolutionary phases of sunspots and sunspot groups on a large statistical sample. Our study is based on the SOHO/MDI – Debrecen Data (SDD). Its high-temporal resolution allows...
Senthamizh Pavai Valliappan (Leibniz Institute for Astrophysics)
3/9/15, 10:00 AM
The long term properties of sunspots aid us in better understanding of the relation between solar dynamo and surface magnetic fields, polar fields and open flux. The continuous observation of sunspots are not available before 1825 but sunspot numbers are available back to 1610. Reconstruction methods are available to derive the sunspot butterfly diagram from sunspot numbers. Studying...
Fabio Del Sordo (NoRDITA/Yale University)
3/9/15, 10:20 AM
The radial velocity method is a powerful way to search for exoplanetary systems and it led to many discoveries of exoplanets in the last 20 years. Nowadays, understanding stellar activity and noise is a key factor for achieving a substantial improvement in such technique. Radial-velocity data are time-series containing the effect of both planets and stellar disturbances: the detection of...