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		| Paper: | 
		Circumstellar Matter Studied by Spectrally-Resolved Interferometry | 
	 
	
		| Volume: | 
		464, Circumstellar Dynamics at High Resolution | 
	 
	
		| Page: | 
		15 | 
	 
	
		| Authors: | 
		Millour, F. | 
	 
	
	
		| Abstract: | 
		This paper describes some generalities about spectro-interferometry and the
 role it has played in the last decade for the better understanding of
 circumstellar matter. I provide a small history of the technique and its
 origins, and recall the basics of differential phase and its central role for
 the recent discoveries. I finally provide a small set of simple
 interpretations of differential phases for specific astrophysical cases, and
 intend to provide a “cookbook” for the other cases. | 
	 
	
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