Supergiant Variables: Recent Observational Results
Autor: | J. R. Percy |
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Rok vydání: | 1993 |
Předmět: | |
Zdroj: | International Astronomical Union Colloquium. 134:123-136 |
ISSN: | 0252-9211 |
DOI: | 10.1017/s0252921100014019 |
Popis: | Recent observations of several types of supergiant variable stars are reviewed: massive blue, yellow and red supergiants; classical and population II Cepheids; RV Tauri stars; yellow semi-regular (SRd) variables, including UU Herculis stars; and R Coronae Borealis stars. The emphasis is on non-linear aspects such as: amplitude and shape of the light and velocity curves; multiperiodicity, irregularity and chaos; long-term changes in period and amplitude; episodic and continuous mass loss. |
Databáze: | OpenAIRE |
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