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roAp stars: surface lithium abundance distribution and magnetic field configuration

Published online by Cambridge University Press:  07 August 2014

N. Polosukhina ,
D. Shulyak ,
A. Shavrina ,
D. Lyashko ,
N. A. Drake ,
Yu. Glagolevski ,
D. Kudryavtsev  and
M. Smirnova
N. Polosukhina
Affiliation:
Crimean Astrophysical Observatory, Nauchnyi, Ukraine, email: polo@crao.crimea.ua
D. Shulyak
Affiliation:
Georg-August University, Göttingen, Germany, email: denis.shulyak@gmail.com
A. Shavrina
Affiliation:
Main Astronomical Observatory of NAS of Ukraine, Kyiv, Ukraine, email: shavrina@mao.kiev.ua
D. Lyashko
Affiliation:
Taurida National V. I. Vernadsky University, Simferopol, Crimean Autonomous Republic, Ukraine, email: dlyashko@gmail.com
N. A. Drake
Affiliation:
Sobolev Astronomical Institute, St. Petersburg State University, St. Petersburg, Russia Observatório Nacional/MCTI, Rio de Janeiro, Brazil, email: drake@on.br
Yu. Glagolevski
Affiliation:
Special Astrophysical Observatory of RAS, Nizhnii Arhyz, Russia, email: dkudr@sao.ru
D. Kudryavtsev
Affiliation:
Special Astrophysical Observatory of RAS, Nizhnii Arhyz, Russia, email: dkudr@sao.ru
M. Smirnova
Affiliation:
Crimean Astrophysical Observatory, Nauchnyi, Ukraine, email: polo@crao.crimea.ua
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Abstract

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High-resolution spectra obtained with the 6m BTA telescope, Russia, and with HARPS and VLT/UVES telescopes at ESO, Chile, were used for Doppler Imaging analysis of two roAp stars, HD 12098 and HD 60435, showing strong and variable Li resonance line in their spectra. We found that Li has highly inhomogeneous distribution on the surfaces of these stars. We compared our results with previously obtained Doppler Imaging mapping of two CP2 stars, HD 83368 and HD 3980, and discuss the correlation between the position of the high Li-abundance spots and magnetic field.

Keywords

stars: abundances – stars: chemically peculiar – stars: magnetic field – stars: individual: HD 3980HD 12098HD 60435HD 83368
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 309 - 310
Copyright
Copyright © International Astronomical Union 2014 

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