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- W1577657701 abstract "{Results from a long-term observational project called the Araucaria Project are presented. Based on Wide Field optical monitoring of 8 nearby galaxies, covering a large range of metallicities, more than 500 Cepheids and a few hundred Blue Supergiant candidates were identified. From the analysis of Cepheid P-L relations of outstanding quality derived from our data we conclude that the slope of these relations in the I band and Wesenheit index are not dependent on metallicity. Comparing the I-band magnitudes of Cepheids of a period of ten days, as computed from our P-L relations, to the I-band magnitudes of the tip of the RGB, which is widely believed to be independent of population effects, we cannot see any obvious dependence of the zero point of the I-band P-L relation on metallicity. A preliminary analysis of IR follow-up observations of sub-samples of the identified Cepheids in various galaxies of the project show that the distances obtained from these data are systematically shorter by about of 0.1 mag than those derived from the optical photometry. It is likely that this effect can be attributed to the internal reddening in the program galaxies." @default.
- W1577657701 created "2016-06-24" @default.
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- W1577657701 date "2005-09-22" @default.
- W1577657701 modified "2023-09-27" @default.
- W1577657701 title "The Araucaria Project" @default.
- W1577657701 hasPublicationYear "2005" @default.
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