Mean light curves of long-period variables and discrimination between carbon- and oxygen-rich stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Stars: Agb, Post-Agb, Methods: Data Analysis, Stars: Carbon, Stars: Variables

Scientific paper

Using 75 years of AAVSO data, mean light curve parameters of a sample of 355 long period M, S, and C mira and semi-regular variable stars are investigated. We present a classification of the light curves of LPVs into 6 distinct groups. Combining this classification with IRAS colors makes it possible to distinguish oxygen-rich from carbon-rich miras. Table 2 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

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