Be Stars in and Around Young Clusters
in the Magellanic Clouds
Stefan C. Keller,
Peter R. Wood,
and
Michael S. Bessell
Mount Stromlo and Siding Spring Observatories,
Private Bag, Weston Creek PO, ACT 2611, Australia
We present the results of a search for Be stars in six
fields centered on the young clusters NGC 330 and NGC 346 in the SMC,
and NGC 1818, NGC 1948, NGC 2004 and NGC 2100 in the LMC. Be stars
were identified by differencing R band and narrow-band
H
CCD images. Our comparatively large images provide substantial Be
star populations both within the clusters and in their surrounding
fields. Magnitudes, positions and finding charts are given for the 224
Be stars found. The fraction of Be stars to normal B stars within
each cluster is found to vary significantly although the average ratio
is similar to the average Be to B star ratio found in the Galaxy. In
some clusters, the Be star population is weighted to magnitudes near
the main sequence turn-off. The Be stars are redder in
V-I than normal main-sequence stars of similar magnitude
and the redness increases with increasing
H
emission strength.
1999, A&A, 134, 489
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