Sökning: "Plages"

Hittade 2 avhandlingar innehållade ordet Plages.

1. 1. Imaging spectropolarimetry of solar active regions

   Författare :Gautam Narayan; Göran Scharmer; Rolf Schlichenmaier; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sun; Spectropolarimetry; Solar magnetic fields; Sunspots; Plages; Solar physics; Solfysik; Astronomy; astronomi;

   Sammanfattning : Solar magnetic fields span a wide range of spatial scales from sunspots and plages to magnetic bright points. A clear understanding of the physical processes underlying the evolution of these magnetic features requires high-resolution spectropolarimetric observations of solar active regions and comparisons with synthetic data from simulations. LÄS MER

3. 2. Stellar Surface Structures and the Astrometric Serach for Exoplnaets

   Författare :Urban Eriksson; Lindegren Lennart; Kristianstad University; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astrometry; astronomy;

   Sammanfattning : Measuring stellar parallax, position and proper motion is the task of astrometry. With the development of new and much more accurate equipment, different noise sources are likely to affect the very precise measurements made with future instruments. LÄS MER