Small magellanic cloud be stars: color-magnitude relations and mass-loss
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Publication date
2008
Authors
de Wit, W.J.M.
Lamers, H.J.G.L.M.
Marquette, J.B.
Beaulieu, J.P.
Editors
de Koter, A.
Smith, L.J.
Waters, L.B.F.M.
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Abstract
We present an analysis of optical lightcurves of Small Magellanic Cloud (SMC) Be-type stars. Observations show that (1) optical excess flux is correlated with near-IR excess flux indicating a similar mechanism and (2) the lightcurves can trace out “loops” in a colour-magnitude diagram. A simple model for the time dependence of bound-free and free-free (bf-ff) emission produced by an outflowing circumstellar disk gives reasonable fits to the observations.
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de Wit, W J M, Lamers, H J G L M, Marquette, J B & Beaulieu, J P 2008, Small magellanic cloud be stars: color-magnitude relations and mass-loss. in A de Koter, L J Smith & L B F M Waters (eds), Mass loss from stars and the evolution of stellar clusters : proceedings of a workshop held at Lunteren, The Netherlands 29 May - 1 June 2006. Astronomical Society of the Pacific conference series, no. 388, Astronomical Society of the Pacific, San Francisco, pp. 163-164.