P. Karczmarek, W. A. Dziembowski, P. Lenz, P. Pietrukowicz, G. Pojmanski
A catalog of Cepheids in the Large Magellanic Cloud (LMC) from the ASAS
project is presented. It contains data on 65 fundamental mode pulsators with
periods longer than about 8 days. The period-luminosity (PL) relation in the
V-band does not significantly differ from the relation determined by Soszynski
et al. (2008) from the OGLE data extended toward longer periods but with much
larger spread. For objects with periods longer than 40 days there is an
evidence for a shallower PL relation. The rates of long-term period variations
significant at 3 sigma level are found only for 7 objects. The rates for 25
objects determined with the 1 sigma significance are confronted with the values
derived from stellar evolution models. The models from various sources yield
discrepant predictions. Over the whole data range, a good agreement with
measurements is found for certain models but not from the same source.
View original:
http://arxiv.org/abs/1201.0790
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