The Stellar Associations, Evolution Associations and The Stars Evolution
Hambardzumyans theoretical analysis based on of the observational material for stellar systems belonging to our Galaxy resulted in a discovery of a new type of stellar systems. These expanding systems endowed with a positive energy he named “stellar associations” and proved their relatively young age. This proved to be a revolutionary basis in stellar cosmology, since it implied that the star formation process in the Galaxy is going on even today and the stars are born in groups. In 1950 Amartsumian was awarded his second Stalin Prize for the discovery and the research of the new type of stellar systems.
The concept of stellar association was not immediately accepted by the astronomical community though. Many years later Chandrasekhar wrote: "I recall the early scepticism with which this discovery was received by the astronomers of the 'establishment' when I first gave an account of (Hambardzumyan's) paper at the colloquium at the Yerkes Observatory in late 1950."
Observations of expansion (as predicted by Ambartsumian) were reported for some associations, e.g. by A. Blaauw for Perseus II, Scorpio-Centaurus, etc.
Read more about this topic: Viktor Hambardzumyan, Scientific Activity
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