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@inproceedings{1229864,
author = {Oksala, Mary Elisabeth and Kochukhov, Oleg and Krtička, Jiří and Prvák, Milan and Mikulášek, Zdeněk},
address = {Cambridge, UK},
booktitle = {New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry},
doi = {http://dx.doi.org/10.1017/S1743921314007066},
editor = {Georges Meynet, Cyril Georgy, José Groh, Philippe Stee},
keywords = {stars: magnetic fields; stars: rotation; stars: early-type; stars: circumstellar matter; stars: individual: HD 37479; techniques: spectroscopic; techniques: polarimetric; ultraviolet: stars},
howpublished = {tištěná verze "print"},
language = {eng},
location = {Cambridge, UK},
isbn = {978-1-107-07858-1},
pages = {348-352},
publisher = {International Astronomical Union},
title = {Unraveling the variability of sigma Ori E},
url = {http://adsabs.harvard.edu/abs/2015IAUS..307..348O},
year = {2015}
}
TY - JOUR
ID - 1229864
AU - Oksala, Mary Elisabeth - Kochukhov, Oleg - Krtička, Jiří - Prvák, Milan - Mikulášek, Zdeněk
PY - 2015
TI - Unraveling the variability of sigma Ori E
PB - International Astronomical Union
CY - Cambridge, UK
SN - 9781107078581
KW - stars: magnetic fields
KW - stars: rotation
KW - stars: early-type
KW - stars: circumstellar matter
KW - stars: individual: HD 37479
KW - techniques: spectroscopic
KW - techniques: polarimetric
KW - ultraviolet: stars
UR - http://adsabs.harvard.edu/abs/2015IAUS..307..348O
N2 - Sigma Ori E (HD 37479) is the prototypical helium-strong star shown to harbor a strong magnetic field, as well as a magnetosphere consisting of two clouds of plasma. The observed optical (ubvy) light curve of sigma Ori E is dominated by eclipse features due to circumstellar material, however, there remain additional features unexplained by the Rigidly Rotating Magnetosphere (RRM) model of Townsend & Owocki (2005). Using the technique of magnetic Doppler imaging (MDI), spectropolarimetric observations of sigma Ori E are used to produce maps of both the magnetic field topology and various elemental abundance distributions. We also present an analysis utilizing these computed MDI maps in conjunction with non-local thermodynamical equilibrium TLUSTY models to study the optical brightness variability of this star arising from surface inhomogeneities. It has been suggested that this physical phenomena may be responsible for the light curve inconsistencies between the model and observations.
ER -
OKSALA, Mary Elisabeth, Oleg KOCHUKHOV, Jiří KRTIČKA, Milan PRVÁK a Zdeněk MIKULÁŠEK. Unraveling the variability of sigma Ori E. In Georges Meynet, Cyril Georgy, José Groh, Philippe Stee. \textit{New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry}. Cambridge, UK: International Astronomical Union, 2015, s.~348-352. ISBN~978-1-107-07858-1. Dostupné z: https://dx.doi.org/10.1017/S1743921314007066.
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