|   | 
				
					
	
		  | 
	 
	
		| Paper: | 
		The Halo from the Outside In: QSO Absorption Lines | 
	 
	
		| Volume: | 
		92, Formation of the Galactic Halo. . . . Inside and Out | 
	 
	
		| Page: | 
		501 | 
	 
	
		| Authors: | 
		Churchill, Christopher W.; Vogt, Steven S. | 
	 
	
	
		| Abstract: | 
		Studies of high resolution quasar absorption lines (QALs), arising from gas in local and z <= 1.5 galaxies, provide direct probes of the kinematic, chemical, and ionization conditions and evolution of Milky Way--like galaxies. Inferences drawn from these studies provide a powerful analog for those based upon direct studies of the halo. The observed gas kinematics and velocity evolution reveal that galactic halos are complex dynamical components, consistent with Searle--Zinn formation scenarios. | 
	 
	
		| 
			
			
		 | 
	 
	
		  | 
	 
 
					 
				 | 
				  |