Physics
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995llnl.reptr....p&link_type=abstract
Technical Report, Lawrence Livermore National Lab. Livermore, CA United States
Physics
Blue Stars, Spatial Distribution, Variable Stars, Morphology, Catalogs (Publications), Light Curve, Variability, Brightness
Scientific paper
The MACHO Project database was searched for aperiodic blue variables in the LMC. Of approximately 250,000 bright blue stars in the region of observation, around 3,500 had been flagged as variables or as rejected gravitational microlensing candidates from a visual inspection of this set, about 400 stars were selected for the catalog. These stars have been categorized by their light curve morphology. Their spatial distribution is presented and correlated with known phenomena. Analysis of the catalog stars has produced some interesting discoveries. Among some of these variables, unusual color changes were found. Some stars become redder or do not change color when their brightness increases, whereas most stars become bluer if they rapidly brighten. For some stars with relatively long quiescent stages, the light curves were searched for low-level, periodic variability, but no conclusive evidence for such behavior was found.
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