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		| Paper: | 
		Stellar Populations: High Spectral Resolution Libraries. Improved TP-AGB Treatment | 
	 
	
		| Volume: | 
		374, From Stars to Galaxies: Building the Pieces to Build Up the Universe | 
	 
	
		| Page: | 
		303 | 
	 
	
		| Authors: | 
		Bruzual, G. | 
	 
	
	
		| Abstract: | 
		I present a short description of the STELIB, HNGSL, IndoUS, MILES, ELODIE, UVES-POP, and IRTF libraries of empirical stellar spectra and show some applications of their use in population synthesis models. When new calculations of the TP-AGB evolutionary phase for stars of different mass and metallicity are included in population synthesis models, the stellar mass in galaxies at z from 1 to 3 determined from spectro-photometric data can be up to 50% lower than the mass determined from the BC03 models. The ages inferred for these populations are considerably lower than the BC03 estimates. | 
	 
	
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