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Effects of Velocities on Ca II H and K Lines

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dc.contributor.author Rangarajan, K. E
dc.contributor.author Mohan Rao, D
dc.contributor.author Peraiah, A
dc.date.accessioned 2005-03-04T05:04:30Z
dc.date.available 2005-03-04T05:04:30Z
dc.date.issued 1981
dc.identifier.citation Kodaikanal Observatory Bulletins Series A, Vol. 3, pp. 75-83 en
dc.identifier.issn 0374-3632
dc.identifier.uri http://hdl.handle.net/2248/381
dc.description.abstract Ca II H and K (3968, 3933) and infrared triplet lines lamda lamda lamda 8498, 8662, 8542 were calculated in a very slowly expanding medium. Five level atom with continuum was considered. Radiative transfer equation and statistical equilibrium equations were solved simultaneously in the star's rest frame within the frame work of the discrete space theory technique of Grant and Peraiah (1972). Profiles were computed for the systematic expanding velocities 0.0, 0.5 and 1.0 (expressed in mean thermal units). Even though the velocities are small, they seem to effect the shape of the H and K profiles quite considerably. A single emission peak instead of a double peaked emission for the K lines was obtained when V = 1, and at mu = 0.79. These small velocities do not affect the infrared triplet lines significantly. en
dc.format.extent 183895 bytes
dc.format.mimetype application/pdf
dc.language.iso en
dc.publisher Indian Institute of Astrophysics, Bangalore en
dc.subject Effects of Velocities on Ca II and K lines en
dc.subject Infrared en
dc.subject Radiative transfer en
dc.title Effects of Velocities on Ca II H and K Lines en
dc.type Article en

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