Magnetic Doppler imaging of II Peg

Rotational modulation of the intensity and polarization spectra of magnetic stars offers a unique possibility to reconstruct the structure of surface magnetic fields and to investigate their relation to cool starspots. We have developed a new magnetic Doppler imaging code which aims at self-consiste...

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Bibliographic Details
Published inProceedings of the International Astronomical Union Vol. 4; no. S259; pp. 439 - 440
Main Authors Kochukhov, Oleg, Piskunov, N., Ilyin, I., Tuominen, I.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.11.2008
Subjects
Astronomy
Circular polarization
Contributed Papers
Image resolution
Magnetic fields
Magnetic stars
Rotational spectra
Scientific imaging
Stars & galaxies
Starspots
Stellar magnetic fields
Stars: activity – stars: atmospheres – stars: magnetic fields – stars: II Peg
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Summary:Rotational modulation of the intensity and polarization spectra of magnetic stars offers a unique possibility to reconstruct the structure of surface magnetic fields and to investigate their relation to cool starspots. We have developed a new magnetic Doppler imaging code which aims at self-consistent temperature and magnetic mapping of cool active stars. Here we present magnetic Doppler imaging analysis of high-resolution circular polarization observations of the active star II Peg. We demonstrate that a self-consistent approach to magnetic inversion unveils stronger magnetic fields than found previously through disjoint analyses of polarization and intensity observations of active stars.
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ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921309031056