T Tauri star


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T Tauri star

[′tē ′tȯr·ē ‚stär]
(astronomy)
A star, with mass from 0.5 to 2.5 solar masses, in an early stage of formation at which interaction with its associated nebulosity, as well as possible internal instabilities, make it variable in luminosity and render its spectrum very peculiar. Also known as nebular variable.
References in periodicals archive ?
Classical T Tauri stars are often surrounded by dust and gas.
The odd thing is that it's been remarkably difficult to find spectroscopic binaries among the classical T Tauri stars.
That could explain why some naked T tauri stars have companions but no circumstellar material, whereas classical T Tauri stars, with their accompanying dust clouds, appear rarely to have companions.
T Tauri stars show outbursts of this kind, and so do FU Orionis stars, but FU Orionis spectra show absorption of light by calcium, whereas Object 50 shows emission by calcium.