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Paper: Red Variables in the OGLE-II Database: First Results for the LMC
Volume: 310, Variable Stars in the Local Group (IAU Colloquium 193)
Page: 55
Authors: Kiss, L.L.; Bedding, T.R.
Abstract: We present a period analysis of more than 23 000 red giants in the Large Magellanic Cloud observed by the OGLE-II microlensing project. Periods combined with the single-epoch 2MASS J H KS magnitudes revealed the complex distributions of stars in the period-luminosity plane. Besides four different sequences corresponding to different modes of pulsation in AGB stars, we also discovered two distinct and well separated sequences below the tip of the Red Giant Branch, consisting of almost 10 000 short-period and low-amplitude red giants, showing radial pulsations in the second and third overtone modes.
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