
				Value of input parameter [Distance to the star]:
				<b>Distance of the external source</b><br/><i>Unit: pc</i><br/>- if  0.0: no star illuminate the cloud<br/>- if >0.0: a star illuminate the cloud on the backside<br/>- if <0.0: a star illuminate the cloud on the observer side<br/>Fortran variable : d_sour