Essays about: "Ap Bp"

Found 3 essays containing the words Ap Bp.

1. 1. Magnetic field of the Ap star EP UMa

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Jakob Melin; [2023]
   Keywords : stars: chemically peculiar - stars: magnetic fields – stars: individual: EP UMa;

   Abstract : Magnetic fields play a crucial roll in the stellar activity and evolutionof stars. Despite much research there is much that we do notunderstand. Among Ap stars, empirical evidence has suggested a minimumthreshold for the dipolar magnetic field strength of Bp ≈ 300G. READ MORE

3. 2. Magnetic Field of HD119419 From Four Stokes Parameter Observations

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Andreas Lundin; [2015]
   Keywords : magnetic; HD119419; HD 119419; Stokes; Chemically peculiar; Ap; Ap Bp; Cp; polarisation; polarization; Zeeman effect; LSD; least-squares deconvolution; abundance; abundance anlysis; longitudinal magnetic field; rotational period; period;

   Abstract : We have used a series of observations of HD119419, performed in 2012 and 2013at the European Southern Observatory 3.6-m telescope in La Silla, Chile. These are high resolutionspectropolarimetric observations with coverage in all four Stokes parameters. READ MORE

4. 3. Local vegetation history of Norway spruce (Picea abies (L.) Karst.) in central Scandes (Sweden) since the mid-Holocene

   University essay from SLU/Dept. of Forest Ecology and Management

   Author : Pablo Garrido Rodriguez; [2008]
   Keywords : Holocene; Picea abies; pollen analysis; macrofossils; immigration; peat core; west central Scandes;

   Abstract : The former migration theory of Norway spruce (Picea abies (L.) Karst.) suggested that spruce established in Sweden along the Swedish Bothnian coast c. 3500 years ago from an eastern refuge area through Finland. READ MORE