Large Magellanic Cloud Cepheids in the ASAS Data

Details Large Magellanic Cloud Cepheids in the ASAS Data Large Magellanic Cloud Cepheids in the ASAS Data

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aca....61..303k&link_type=abstract

Acta Astronomica, vol 61, no 4, p. 303-318

Astronomy and Astrophysics

Astronomy

Stars: Evolution, Stars: Variables: Cepheids, Magellanic Clouds

Scientific paper

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 from the OGLE-III data extended toward longer periods but shows much larger scatter. For objects with periods longer than 40 d there is an evidence for a shallower PL relation. The rates of long-term period variations significant at 3σ level are found only for seven objects. The rates for 25 objects determined with the 1σ 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.

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