dc.contributor.author |
Sumangala Rao, S |
|
dc.contributor.author |
Giridhar, S |
|
dc.date.accessioned |
2014-03-27T08:52:59Z |
|
dc.date.available |
2014-03-27T08:52:59Z |
|
dc.date.issued |
2014-04 |
|
dc.identifier.citation |
Revista Mexicana de Astronomica y Astrofisica serie de conferencias, Vol. 50, pp. 49-65 |
en |
dc.identifier.issn |
0185-1101 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/6583 |
|
dc.description |
Open Access |
en |
dc.description.abstract |
We have undertaken a comprehensive abundance analysis for a sample of relatively unexplored RV Tauri and RV Tauri like stars to further our understanding of post-Asymptotic Giant Branch (post-AGB) evolution. From our study based on high resolution spectra and a grid of model atmospheres, we find indications of mild s-processing for V820 Cen and IRAS 06165+3158. On the other hand, SU Gem and BT Lac exhibit the effects of mild dust-gas winnowing. We have also compiled the existing abundance data on RV Tauri objects and find that a large fraction of them are afflicted by dust-gas winnowing and aided by the present work, we find a small group of two RV Tauris showing mild s-process enhancement in our Galaxy. With two out of three reported s-process enhanced objects belonging to RV Tauri spectroscopic class C, these intrinsically metal-poor objects appear to be promising candidates to analyse the possible s-processing in RV Tauri stars. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Institute de Astronomia |
en |
dc.relation.uri |
http://www.astroscu.unam.mx/~rmaa/ |
en |
dc.rights |
© Institute de Astronomia |
en |
dc.subject |
Stars: abundances |
en |
dc.subject |
Stars: AGB and post-AGB |
en |
dc.subject |
Stars: variables |
en |
dc.title |
Chemical Compositions of RV Tauri Stars and Related Objects |
en |
dc.type |
Article |
en |