Three O-type supergiants observed by TESS show low-frequency periodicities and near-constant frequency spacings, which the authors interpret as rotationally split gravity modes and possible Rossby waves.
A Spectroscopic Study of Field and Runaway OB Stars
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abstract
Identifying binaries among runaway O- and B-type stars offers valuable insight into the evolution of open clusters and close binary stars. Here we present a spectroscopic investigation of 12 known or suspected binaries among field and runaway OB stars. We find new orbital solutions for five single-lined spectroscopic binaries (HD 1976, HD 14633, HD 15137, HD 37737, and HD 52533), and we classify two stars thought to be binaries (HD 30614 and HD 188001) as single stars. In addition, we reinvestigate their runaway status using our new radial velocity data with the UCAC2 proper motion catalogs. Seven stars in our study appear to have been ejected from their birthplaces, and at least three of these runaways are spectroscopic binaries and are of great interest for future study.
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astro-ph.SR 1years
2026 1verdicts
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Gravity modes and potential evidence for Rossby Waves in late O-type supergiants
Three O-type supergiants observed by TESS show low-frequency periodicities and near-constant frequency spacings, which the authors interpret as rotationally split gravity modes and possible Rossby waves.