Definitions for t tauri star

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  1. T Tauri star(Noun)

    a class of young visible stars having optical variability; they are often surrounded by a protoplanetary disc

  2. Origin: named after the prototype star of its class, T Tauri

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  1. T Tauri star

    T Tauri stars are a class of variable stars named after their prototype – T Tauri. They are found near molecular clouds and identified by their optical variability and strong chromospheric lines. T Tauri stars are pre-main sequence stars in the process of contracting to the main sequence along the Hayashi track, a luminosity-temperature relationship obeyed by infant stars of less than 3 solar masses in the pre-main-sequence phase of stellar evolution. It ends when a star of 0.5 solar masses develops a radiative zone, or when a larger star commences nuclear fusion on the main sequence.


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