High-frequency continuum observations of young stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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B Stars, Early Stars, O Stars, Radio Observation, Stellar Spectra, Emission Spectra, High Frequencies, Interstellar Gas, Line Spectra, Signal Detection, Stellar Mass Ejection

Scientific paper

31-GHz and/or 90-GHz radio continuum observations have been made towards 48 young stars. Only three signals are definitely detected and are shown to represent late O or early B stars. None of the 'continuum T Tauri stars' were detected, suggesting that these are unlikely to be hot stars. Some early B stars should have been detectable if they have normal Stromgren zones. Their undetectability may well signify that circumstellar dust modifies the ionization of surrounding gas.

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