Large Magellanic Cloud Cepheids in the ASAS Data

作者：Karczmarek P^*; Dziembowski W A; Lenz P; Pietrukowicz P; Pojmanski G

来源：Acta Astronomica, 2011, 61(4): 303-318.

• Stars: evolution
• Stars: variables: Cepheids
• Magellanic Clouds

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 3 sigma level are found only for seven 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.

• 出版日期2011