Red variables in the OGLE-II database. I. Pulsations and period-luminosity relations below the tip of the Red Giant Branch of the LMC

Details Red variables in the OGLE-II database. I. Pulsations and period-luminosity relations below the tip of the Red Giant Branch of the LMC Red variables in the OGLE-II database. I. Pulsations and period-luminosity relations below the tip of the Red Giant Branch of the LMC

2003-06-21

arxiv.org/abs/astro-ph/0306426v2

Mon.Not.Roy.Astron.Soc.343:L79,2003

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures; accepted for publication in MNRAS (Pink Pages); proof corrections added

Scientific paper

10.1046/j.1365-8711.2003.06931.x

We present period-luminosity relations for more than 23,000 red giants in the Large Magellanic Cloud observed by the OGLE-II microlensing project. The OGLE period values were combined with the 2MASS single-epoch JHK photometric data. For the brighter stars we find agreement with previous results (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. They consist of almost 10,000 short-period (15 d

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