Radio variability and structure of T Tauri stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Periodic Variations, Plasma Jets, Radio Spectra, Stellar Structure, T Tauri Stars, Astronomical Maps, Radiant Flux Density, Spectral Energy Distribution, Stellar Spectrophotometry

Scientific paper

The authors report primarily on observations of radio variability in V410 Tau and HP Tau/G2 and /G3, and on striking variations in the radio structure of DG Tau. The position of the radio peak of DG Tau has shown apparent motion between 1982 and 1985 along the flow axis from this star, while its morphology has varied from point-like to bipolar. The authors interpret these changes and the spectral index of 0.6 at high frequencies as indicative of a variable, freely expanding radio jet in DG Tau.

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