Brown dwarfs: The stars that failed

Article Abstract:

It was suggested in 1963 that star-like bodies with masses too low to create temperatures needed to ignite nuclear fusion reactions, may exist. Such failed starts became known as brown dwarfs to astronomers. After years of searching for brown dwarfs they have successfully been detected, confirming predictions that methane and dust have an important role in determining their behaviour. However their detection has revealed that the do not make a significant contribution to the dark matter of our Galaxy.

Brown dwarfs

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Jet propulsion is essential for young stars

Article Abstract:

Ouyed, Pudritz and Stone have proposed a new model for examining the mechanics of the generation of fast-flowing jets of material commonly observed to be emitted by young stars. Their model is simple and elegant, and has avoided many of the computational problems of previous studies by characterizing a young star's accretion disk as a given boundary condition. It provides support for the belief that episodic jet propulsions inevitably follow stellar formation.

Stars, Stars, New, Novas

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