description T Tauri Overview
T Tauri is a variable star found in the Taurus molecular cloud and serves as the prototype for the class of pre-main-sequence stellar objects known as T Tauri variables. Discovered in October 1852 by John Russell Hind, the star is part of a multiple-star system that includes several nascent celestial bodies. The star exhibits irregular fluctuations in luminosity and is characterized by its youth and the presence of a surrounding protoplanetary disk. It provides astronomers with a primary reference point for studying early stellar evolution.
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What is a T Tauri star?
A T Tauri star is a young, pre-main-sequence star that has not yet begun sustained hydrogen fusion in its core but is powered by gravitational contraction. These stars are named after T Tauri, the prototype object first identified in the Taurus molecular cloud.
Where was T Tauri discovered?
T Tauri was identified in the Taurus molecular cloud, a star-forming region in the constellation Taurus. The star itself is part of a small group of young stellar objects in this cloud that have been extensively studied by astronomers since their discovery.
How old are T Tauri stars typically?
T Tauri stars are typically less than 10 million years old, making them stellar infants by astronomical standards. They are still in the process of contracting toward the main sequence, where they will eventually begin stable hydrogen fusion like the Sun.
What makes T Tauri stars variable in brightness?
T Tauri stars exhibit irregular brightness fluctuations caused by instabilities in their surrounding accretion disks, starspots, and ongoing material falling onto the stellar surface. Their variability is one of the defining characteristics that distinguishes them from stable main-sequence stars.
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