Articulo
The nature of Sk -67º 18 in the Large Magellanic Cloud: a multiple system with an O3f* component
Autor
Niemelä, Virpi Sinikka
Seggewiss, Wilhem
Moffat, Anthony
Institución
Resumen
We present the results of photometric and spectroscopic observations obtained between 1980 and 1996, which show that the bright star Sk-6718 in the Large Magellanic Cloud (LMC) is a multiple star which contains an eclipsing binary system. Our spectra show that this is an Of + O type binary, where the primary is probably of type O3f*. The orbital period of the eclipsing binary is almost exactly 2 days, which considerably compromises the obtaining of data with suitable phase coverage. Furthermore, from our radial velocity analysis of the spectral lines, Sk-6718 appears to be a multiple system consisting of at least two pairs of short-period binaries. Facultad de Ciencias Astronómicas y Geofísicas