Magnetic doppler imaging of he-strong star HD 184927

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DOIResolve DOI: http://doi.org/10.1017/S174392131400235X
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TypeArticle
Proceedings titleMagnetic fields throughout stellar evolution
Series titleProceedings of the International Astronomical Union; no. 9, issue S302
ConferenceInternational Astronomical Union Symposium 302: Magnetic fields throughout stellar evolution, August 25-30, 2013, Biarritz, France
ISSN1743-9213
ISBN9781107044982
Pages306308; # of pages: 3
AbstractWe have employed an extensive new timeseries of Stokes I and V spectra obtained with the ESPaDOnS spectropolarimeter at the 3.6-m Canada-France-Hawaii Telescope to investigate the physical parameters, chemical abundance distributions and magnetic field topology of the slowly-rotating He-strong star HD 184927. We infer a rotation period of 9d.53071 ± 0.00120 from Hα, Hβ, LSD magnetic measurements and EWs of helium lines. We used an extensive NLTE TLUSTY grid along with the SYNSPEC code to model the observed spectra and find a new value of luminosity. In this poster we present the derived physical parameters of the star and the results of Magnetic Doppler Imaging analysis of the Stokes I and V profiles. Wide wings of helium lines can be described only under the assumption of the presence of a large, very helium-rich spot.
Publication date
PublisherCambridge University Press
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21272721
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Record identifier1dc2ab0f-895a-415f-a8bc-212c056ce68a
Record created2014-12-03
Record modified2017-06-09
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