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		| Paper: | 
		DY Per: Extremely Cool Galactic RCB Star? | 
	 
	
		| Volume: | 
		391, Hydrogen-Deficient Stars | 
	 
	
		| Page: | 
		49 | 
	 
	
		| Authors: | 
		Zacs, L.; Alksnis, O.; Mondal, S.; Chen, W.P.; Pugach, A.F.; Musaev, F.A. | 
	 
	
	
		| Abstract: | 
		Observations of the extremely cool RCB candidate, DYPer, are presented to specify its fundamental parameters and evolutionary status. CCD BVRI photometry and spectroscopy was carried out in 2002/2004. A qualitative analysis was made relative to the typical carbon stars of various types. | 
	 
	
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