Modelling the variability of the CP star phi Dra

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Authors	PRVÁK Milan KRTIČKA Jiří MIKULÁŠEK Zdeněk LÜFTINGER Theresa LIŠKA Jiří
Year of publication	2014
Type	Article in Proceedings
Conference	Putting A Stars into Context: Evolution, Environment, and Related Stars
MU Faculty or unit	Faculty of Science
Citation
Field	Astronomy and astrophysics
Keywords	stars: peculiar; stars: variable; star: HD170000
Description	phi Draconis is one of the brightest known CP stars. We model its light variability using the horizontal distribution of chemical elements in the stellar atmosphere derived from abundance maps. Those elements cause redistribution of the energy from the short-wavelength part of the UV spectrum to longer wavelengths. We compute a grid of LTE model atmospheres, and synthesize a theoretical light curve. The results obtained from our computations are in a very good agreement with the observed variability of the star.
Related projects:	Multispektrální proměnnost horkých hvězd a její příčiny