Lines Formed in Slowly Expanding Thin Spherical Shell

dc.contributor.author	Peraiah, A
dc.contributor.author	Raghunath, G
dc.contributor.author	Nagendra, K. N
dc.date.accessioned	2008-09-17T11:42:32Z
dc.date.available	2008-09-17T11:42:32Z
dc.date.issued	1980
dc.identifier.citation	Kodaikanal Observatory Bulletins Series A, Vol. 3, pp. 30-35	en
dc.identifier.issn	0374-3632
dc.identifier.uri	http://hdl.handle.net/2248/3700
dc.description.abstract	We have investigated how an optically thin spherical shell with small velocities change the profiles and equivalent widths of the lines. We have employed several types of variations in density, velocity of expansion and source functions. In all the cases we find that the line centres are shifted to the blue side almost in proportion to the velocity of expansion. The shells moving with constant velocities shift the line centre the most, irrespective of the density variation. The velocity gradients shift the line centre the least. Maximum velocity of expansion considered is 6 mean thermal units and the total optical depth is taken to be equal to 5.	en
dc.language.iso	en	en
dc.publisher	Indian Institute of Astrophysics, Bangalore	en
dc.subject	Spherically symmetric flow	en
dc.subject	Radiative transfer equation	en
dc.subject	Emergent flux profiles	en
dc.title	Lines Formed in Slowly Expanding Thin Spherical Shell	en
dc.type	Article	en