About T-Tauri stars...

 T-Tauri is the phase after protostars. It is a very young star that has the same mass as that of the Sun. Once a protostar has become a hydrogen-burning star, a strong stellar wind forms, usually along the axis of rotation. Thus, there is a flow of gas out the poles of the star. This is a feature which is easily seen by radio telescopes. This early phase in the life of a star is called the T-Tauri phase.

Young T Tauri stars are usually surrounded by massive, opaque, circumstellar disks. These disks gradually accrete onto the stellar surface, and thereby radiate energy both from the disk, and from the position where material falls onto the star. T Tauri stars therefore represent an intermediate stage between real protostars and low-mass main sequence stars like the Sun.

The nearest T Tauri stars to us are in the Taurus and P-Ophiuchus molecular cloud, both about 400 light years away.

 

By- Kumar Amityush