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The chemical composition and circumstellar environment of the variable star QY Sge
Published online by Cambridge University Press: 12 April 2016
Abstract
Chemical composition studies of the variable star QY Sge show abundance anomalies suggestive of the pattern exhibited by the warmer RV Tau variables. Abundance analysis indicates a near-solar atmosphere with highly condensable elements depleted by several factors. Evidence of broad Na D emission features in its spectrum, a characteristic feature of R CrB stars taken at minimum, however, raises the question of its spectral classification. We address this question through a comparative analysis of its spectrum with those of γ Cyg 89 Her and R CrB taken at minimum, in addition to abundance analysis. We also discuss a possible physical scenario of the circumstellar environment accounting for the characteristics of the distinct spectroscopic features.
- Type
- Part 7. Chemical composition of variable stars
- Information
- International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 430 - 434
- Copyright
- Copyright © Astronomical Society of the Pacific 2004