Period Change and Evolutionary Status of SW Tau
| Autor: | Ahmet Devlen, Mert Acar |
|---|---|
| Přispěvatelé: | Ege Üniversitesi |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Cepheid variable Hertzsprung–Russell diagram Period (gene) Astronomy and Astrophysics Astrophysics Light curve 01 natural sciences 03 medical and health sciences Stars symbols.namesake 0302 clinical medicine Space and Planetary Science 0103 physical sciences stars: individual (SW Tau) symbols Asymptotic giant branch Astrophysics::Solar and Stellar Astrophysics stars: evolution Instability strip Maxima 010303 astronomy & astrophysics 030217 neurology & neurosurgery Astrophysics::Galaxy Astrophysics stars: variables: Cepheids |
| Popis: | In this work, the relation between the period change and evolutionary status of SW Tau, a Type II Cepheid variable, is examined. An (O-C) analysis of the times of maxima of SW Tau has been undertaken to determine this relation. SW Tau has the characteristic light curve shape of BL Her type stars. By taking into consideration SW Tau's well-defined period decrease, obtained from the photometric observations, its position on the HR diagram in accordance with evolutionary models, and its chemical composition, we demonstrate that SW Tau is a Cepheid crossing the instability strip for the fourth time. SW Tau could be interpreted as being an early AGB star on the blueward evolutionary phase during shell helium burning. © 2017. The American Astronomical Society. All rights reserved.. |
| Databáze: | OpenAIRE |
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