Complications in the Balmer-Line Spectrum of TT Hydrae
The Balmer lines of interacting binaries cannot be interpreted in the usual sense as diagnostics of stellar photospheres. In an Algol-type binary, the presence of circumstellar material can lead to inconsistent interpretations about the nature of the hotter stellar component. The system TT Hydrae has fairly well established stellar properties. Its Balmer—line spectrum illustrates complications from circumstellar material. Complications at Hα because of the cooler secondary are also evident. Failure to recognize this complication could result in misinterpretations about the circumstellar material.
KeywordsAccretion Disk Spectral Type Binary Star Secondary Component Balmer Line
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