| KRTIČKA, Jiří, Zdeněk MIKULÁŠEK, Juraj ZVERKO and Jozef ŽIŽŇOVSKÝ. The light variability of the helium strong star HD 37776 as a result of its inhomogeneous elemental surface distribution. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2007, vol. 39, No 470, p. 1089-1098, 12 pp. ISSN 0004-6361. |
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@article{721689,
author = {Krtička, Jiří and Mikulášek, Zdeněk and Zverko, Juraj and Žižňovský, Jozef},
article_location = {Les Ulis Cedex, France},
article_number = {470},
keywords = {stars: chemically peculiar -- stars: early-type -- stars: variables: general -- stars: atmospheres},
language = {eng},
issn = {0004-6361},
journal = {Astronomy and Astrophysics},
title = {The light variability of the helium strong star HD 37776 as a result of its inhomogeneous elemental surface distribution},
url = {http://lanl.arxiv.org/abs/0706.2338},
volume = {39},
year = {2007}
}
TY - JOUR
ID - 721689
AU - Krtička, Jiří - Mikulášek, Zdeněk - Zverko, Juraj - Žižňovský, Jozef
PY - 2007
TI - The light variability of the helium strong star HD 37776 as a result of its inhomogeneous elemental surface distribution
JF - Astronomy and Astrophysics
VL - 39
IS - 470
SP - 1089-1098
EP - 1089-1098
PB - EDP Sciences
SN - 00046361
KW - stars: chemically peculiar -- stars: early-type -- stars: variables: general -- stars: atmospheres
UR - http://lanl.arxiv.org/abs/0706.2338
N2 - We simulate light curves of the helium strong chemically peculiar star HD 37776 assuming that the observed periodic light variations originate as a result of inhomogeneous horizontal distribution of chemical elements on the surface of a rotating star. We show that chemical peculiarity influences the monochromatic radiative flux, mainly due to bound-free processes. Using the model of the distribution of silicon and helium on HD 37776 surface, derived from spectroscopy, we calculate a photometric map of the surface and consequently the uvby light curves of this star. Basically, the predicted light curves agree in shape and amplitude with the observed ones. We conclude that the basic properties of variability of this helium strong chemically peculiar star can be understood in terms of the model of spots with peculiar chemical composition.
ER -
KRTIČKA, Jiří, Zdeněk MIKULÁŠEK, Juraj ZVERKO and Jozef ŽIŽŇOVSKÝ. The light variability of the helium strong star HD 37776 as a result of its inhomogeneous elemental surface distribution. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2007, vol.~39, No~470, p.~1089-1098, 12 pp. ISSN~0004-6361.
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