Essays about: "chemically peculiar star"

Found 4 essays containing the words chemically peculiar star.

1. 1. Magnetic field of the magnetic chemically peculiar star V1148 Ori

   University essay from Uppsala universitet/Institutionen för fysik och astronomi

   Author : Kristoffer Pettersson; [2023]
   Keywords : chemically peculiar star; magnetic fields; deconvolution; zeeman effect; polarization;

   Abstract : This project aims to obtain and interpret the measurements of the mean longitudinal magnetic field of the chemically peculiar star V1148 Ori. To achieve this aim 12 spectropolarimetric observations obtained by the CFHT using the spectropolarimeter ESPaDOnS were used. READ MORE

3. 2. 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

4. 3. The magnetic field of phi Draconis

   University essay from Uppsala universitet/Observationell astrofysik

   Author : Nikolaos Papakonstantinou; [2022]
   Keywords : stars: atmospheres – stars: chemically peculiar – stars: magnetic field – stars: starspots – stars: individual: phi Dra;

   Abstract : Within this past decade, advances in spectropolarimetric analyses allowed mapping surface characteristics of nearby non-resolved stars with unique characteristics. In this study, we attempt mapping of the magnetic field structure and surface distribution of elements for such a star, the magnetic Ap star phi Dra. READ MORE

5. 4. 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