The light variations of HD 37776 as a result of the uneven surface distribution of helium and silicon
| Authors | |
|---|---|
| Year of publication | 2007 |
| Type | Article in Proceedings |
| Conference | Physics of Magnetic Stars |
| MU Faculty or unit | |
| Citation | |
| Web | http://arxiv.org/abs/astro-ph/0703396 |
| Field | Astronomy and astrophysics |
| Keywords | stars: chemically peculiar -- stars: early-type -- stars: variables: other -- stars: atmospheres |
| Description | We calculate the uvby light curves of the helium-strong chemically peculiar (CP) star HD 37776. Assuming that the chemical peculiarity influences the monochromatic radiative flux due to mainly the bound-free processes and using the model of the surface distribution of helium and silicon on HD 37776, as derived from spectroscopy, we calculate the emergent fluxes for a series of its rotational phases. We show that it is possible to consistently simulate light curves of a chemically peculiar star and that the basic properties of variability of helium CP stars can be understood in terms of the model of spots with a peculiar chemical composition. |
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