T Tauri star

Definition

A T Tauri star is a young, pre-main-sequence star that is less than 10 million years old. These stars are characterized by their variability and strong stellar winds.

5 Must Know Facts For Your Next Test

1. T Tauri stars are often found in regions of recent star formation.
2. They exhibit irregular brightness due to their dynamic atmospheres and accretion processes.
3. T Tauri stars often have circumstellar disks, which can eventually form planetary systems.
4. Their mass is typically similar to or less than that of the Sun.
5. These stars generate energy primarily through gravitational contraction rather than nuclear fusion.

Review Questions

• What age range typically defines a T Tauri star?
• Why do T Tauri stars exhibit irregular brightness?
• What is the primary source of energy for a T Tauri star?

Related terms

Protostar: An early stage in the formation of a star before it reaches the main sequence.

Circumstellar Disk: A disk of gas and dust surrounding a young star, potentially leading to planet formation.

Main Sequence Star: A stable star that has begun nuclear fusion in its core, converting hydrogen into helium.