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		| Paper: | 
		Observational Evidence of the Evolutionary Enhancement of the Be Phenomenon | 
	 
	
		| Volume: | 
		361, Active OB-Stars: Laboratories For Stellar and Circumstellar Physics | 
	 
	
		| Page: | 
		363 | 
	 
	
		| Authors: | 
		Fabregat, J. | 
	 
	
	
		| Abstract: | 
		Observational results obtained during the past few years support the existence of an evolutionary enhancement of the Be phenomenon along the B stars main sequence lifetime. In this paper we analyze recent related work, including: i/ the study of the frequency of Be stars in open clusters as a function of the cluster age; ii/the detailed analysis of the frequency of Be stars as a function of the spectral subtype in a few well studied young clusters; iii/ the determination of the evolutionary status of Be stars in the galactic field. | 
	 
	
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