Type II Cepheids Pulsating in the First Overtone from the OGLE Survey
نویسندگان
چکیده
منابع مشابه
Hydrodynamical Survey of First Overtone Cepheids
A hydrodynamical survey of the pulsational properties of first overtone Galactic Cepheids is presented. The goal of this study is to reproduce their observed lightand radial velocity curves. The comparison between the models and the observations is made in a quantitative manner on the level of the Fourier coefficients. Purely radiative models fail to reproduce the observed features, but convect...
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We present a detailed comparison between predicted and empirical PLI,K relations and Wesenheit function for Galactic and Magellanic Clouds (MCs) First Overtone (FO) Cepheids. We find that zero-points predicted by Galactic Cepheid models based on a noncanonical (mild overshooting) Mass-Luminosity (ML) relation are in very good agreement with empirical zero-points based on HIPPARCOS parallaxes, w...
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Search for second overtone mode Cepheids in the Magellanic Clouds
Accurate CCD observations of three Cepheids in the SMC were made with the purpose of confirming their nature of second overtone mode Cepheids. The stars were suspected pulsating in the second overtone mode owing to the unusual light curve and short period reported by Payne-Gaposchkin & Gaposchkin (1966). The analysis of the new data shows that for two stars the previous periods are wrong, and i...
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Pulsating convective models and evolutionary tracks are used to constrainmass, luminosity, and effective temperature of metal-poor (Z in the range of 0.0001 to 0.001) low-mass (0.52M –0.80M ) fundamental pulsators connected with the horizontal branch and asymptotic branch phase. On this basis the fundamental period P (F ) and the absolute blue magnitudeB of the pulsators are calculated. We show...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2019
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab04ab