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		| Paper: | 
		Rotation, Magnetism, Binarity, and Chemical   Peculiarities in A-type Stars | 
	 
	
		| Volume: | 
		479, Progress in Physics of the Sun and Stars | 
	 
	
		| Page: | 
		81 | 
	 
	
		| Authors: | 
		Mathys, G. | 
	 
	
	
		| Abstract: | 
		New observational results indicate the existence, with a high level of significance, of a mutual exclusion of short rotational and orbital periods in non-synchronised binaries containing an Ap component. I argue that this supports the merger scenario for the origin of Ap stars. | 
	 
	
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