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| Paper: |
The Chemical Composition and Circumstellar Environment of the Variable Star QY Sge |
| Volume: |
310, Variable Stars in the Local Group (IAU Colloquium 193) |
| Page: |
430 |
| Authors: |
Goswami, A.; Kameswara Rao, N.; Lambert, D.L. |
| 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. |
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